Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Tsuyoshi Yoshitake Last modified date:2019.07.19

Associate Professor / Quantum Materials Physics / Department of Advanced Energy Science and Engineering / Faculty of Engineering Sciences


Presentations
1. Tsuyoshi Yoshitake, Mohamed Egiza, Koki Murasawa, Mohamed Ali, Hiroshi Naragino, Aki Tominaga, Yasuo Fukui, Hidenobu Gonda, Masatoshi Sakurai, Hard Coating of Ultrananocrystalline Diamond/Nonhydrogenated amorphous Carbon Composite Films on Cemented Carbide, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
2. Kazuki Kudo, Satoshi Takeichi, Kazutoshi Nakashima, Ken-ichiro Sakai, Masahiko, Nishijima, Tsuyoshi Yoshitake, Structural evaluations of Fe/boron-doped carbon/Fe3Si spin-valve junctions, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
3. Kazuki Kudo, Satoshi Takeichi, Kazutoshi Nakashima, Ken-ichiro Sakai, Tsuyoshi Yoshitake , Magnetoresistance effects in spin-valves comprising N-doped carbon interlayers, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
4. Satoshi Takeichi, Naofumi Nishikawa, Yuki Katamune, Tsuyoshi Yoshitake, Photodetection properties of heterojunction diodes comprising boron-doped ultrananocrystalline diamond films prepared by coaxial arc plasma deposition and n-type silicon substrates, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
5. Satoshi Takeichi, Takashi Nishiyama, Mitsuru Tabara, Shuichi Kawawaki, Masamichi, Kohno, Koji Takahashi, Tsuyoshi Yoshitake, Effects of hydrogenation on thermal transport in ultrananocrystalline diamond/amorphous carbon composite films
, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
6. Tsuyoshi Yoshitake, Mohamed Egiza, Koki Murasawa, Mohamed Ali, Hiroshi Naragino, Aki Tominaga, Yasuo Fukui, Hidenobu Gonda, Masatoshi Sakurai, Si Doping Effects on Mechanical Properties of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films Deposited on Cemented Carbide Substrates by Coaxial Arc Plasma Deposition
, 11th International Symposium on Atomic Level Characterizations for New Materials and Devices ’17 (ALC17), 2017.12.
7. T. Nogami, N. Ishizaka, S. Uchida, T. Yoshitake, Epitaxial growth of beta-FeSi2 thin films prepared by co-sputtering with high purity Fe and Si targets, The 2nd Asian Applied Physics Conference (Asian-APC) , 2017.12.
8. K. Murasawa, M. Egiza, M. Ali, T. Yoshitake, Near-edge X-ray absorption fine-structure spectroscopic study on ultrananocrystalline diamond/nonhydrogenated amorphous carbon composite films prepare by coaxial arc plasma deposition
, The 2nd Asian Applied Physics Conference (Asian-APC), 2017.12.
9. H. Ishimoto, K. Kudo, K. Sakai, T. Yoshitake, Fabrication of lateral spinvalves comprising FeSi2 spin-transfer layers by electron beam lithography
, The 2nd Asian Applied Physics Conference (Asian-APC), 2017.12.
10. Eslam Abubakr, Hiroshi Ikenoue, Tsuyoshi Yoshitake, Laser-induce phosphorus doping in phosphoric acid liquids for singlecrystalline diamond
, The 2nd Asian Applied Physics Conference (Asian-APC), 2017.12.
11. N. Promros, P. Sittimart, T. Nogami, T. Yoshitake, Carrier Transport Properties at Low Temperatures in p-Type Si/n-Type ß-FeSi2 Heterojunctions Created by Radio-Frequency Magnetron Sputtering
, The 2nd Asian Applied Physics Conference (Asian-APC), 2017.12.
12. N. Promros, R. Chaleawpong, P. Sittimart, T. Hanada, S. Ohmagari, T. Yoshitake, Estimation of Interface State Density in B-doped p-Type UNCD/a-C:H/n-Type Si Heterojunctions Formed by Pulsed Laser Deposition
, The 2nd Asian Applied Physics Conference (Asian-APC), 2017.12.
13. Kazuki Kudo, Satoshi Takeichi, Kazutoshi Nakashima, Ken-ichiro Sakai,Tsuyoshi Yoshitake, Magnetoresistance effects in Fe/nanodiamond/Fe3Si trilayered junctions at room temperature, Cross Straits Symposium on Energy and Environmental Science and Technology, 2017.11.
14. Naofumi Nishikawa, Satoshi Takeichi, Takanori Hanada, Shuya Tategami, Atsuhiko Fukuyama, Tsuyoshi Yoshitake , Minority Carrier Lifetimes in Nitrogen-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, Cross Straits Symposium on Energy and Environmental Science and Technology, 2017.11.
15. Ali M. Ali, Mohamed Egiza, Koki Murasawa, Yasuo Fukui, Hidenobu Gonda, Masatoshi Sakurai, Tsuyoshi Yoshitake, Negative bias effects on the growth and mechanical properties of ultrananocrystaline diamond/amorphous carbon films deposited on cemented carbide substrates by coaxial arc plasma deposition, Cross Straits Symposium on Energy and Environmental Science and Technology, 2017.11.
16. Naofumi Nishikawa, Satoshi Takeichi, Yuki Katamune, Tsuyoshi Yoshitake, Photodetection in heterojunctions comprising boron-doped ultrananocrystalline diamond/hydrogenated amorphous carbon composite films and n-type Si substrates, International Exchange and Innovation Conference on Engineering & Sciences (IEICES 2017) , 2017.10.
17. Tsuyoshi Yoshitake, Eslam Abubakr, Hiroshi Ikenoue, Application of laser-induced doping in liquids containing dopants to diamond, OIST Diamond Workshop, 2017.10.
18. Satoshi Takeichi, Takashi Nishiyama, Mitsuru Tabara, Shuichi Kawawaki, Masamichi Kohno, Koji Takahashi, Tsuyoshi Yoshitake, Thermal conductivities of ultrananocrystalline diamond/amorphous carbon composite films prepared by coaxial arc plasma deposition, OIST Diamond Workshop, 2017.10.
19. Naofumi Nishikawa, Satoshi Takeichi, Shuya Tategami, Kenjiro Takauchi, Naoki Matsuda, Yuki Katamune, Atsuhiko Fukuyama, and Tsuyoshi Yoshitake, Doping effects on minority-carrier lifetimes in ultrananocrystalline diamond/hydrogenated amorphous carbon composite films, JSAP-OSA Joint Symposia 2017,第78回応用物理学会秋季学術講演会, 2017.09.
20. N. Nishikawa, S. Takeichi, T. Hanada, H. Gima, S. Tategami, A. Iwamoto, H. Takeda, A. Fukuyama, T. Yoshitake, Minority-carrier lifetimes in ultrananocrystalline diamond/amorphous carbon composite films prepared by coaxial arc plasma deposition, The 15th International Conference on Advance Materials, 2017.08.
21. Ken-ichiro Sakai, Masahiko Nishijima, Tsuyoshi Yoshitake, Local and non-local structural spin valves comprising Fe3Si/FeSi2/Fe3Si trilayer films, 9th International School and Conference on Spintronics and Quantum Information Technology (Spin TECH IX) , 2017.06.
22. Takayasu Hanashima, Tsuyoshi Yoshitake, Satoshi Takeichi, Noboru Miyata, Ken-ichiro Sakai, Hiroyuki Deguchi, Polarized Neutron Reflectivity Study on Magnetic Structure in Fe3Si/FeSi2 Superlattices, 9th International School and Conference on Spintronics and Quantum Information Technology (Spin TECH IX), 2017.06.
23. Satoshi Takeichi, Kazutoshi Nakashima, Kazuki Kudo, Ken-ichiro Sakai, Tsuyoshi Yoshitake, Spin valve effects in trilayered films comprising nitrogen-doped carbon interlayers, 9th International School and Conference on Spintronics and Quantum Information Technology (Spin TECH IX), 2017.06.
24. Kazuki Kudo, Kazutoshi Nakashima, Satoshi Takeichi, Ken-ichiro Sakai, Masahiko Nishijima, Tsuyoshi Yoshitake, Magnetoresistance effects in Fe/B-doped carbon/Fe3Si trilayered spin valve junctions, 9th International School and Conference on Spintronics and Quantum Information Technology (Spin TECH IX), 2017.06.
25. Abdelrahman Zkria, Tsuyoshi Yoshitake, Applications of Ultrananocrystalline Diamond/hydrogenated amorphous carbon to electronic devises, The 1st International Conference on Physics, Materials Sciences and Engineering (ICPMSE-2017), 2017.03.
26. Hiroki Gima, Tsuyoshi Yoshitake, Chemical Bonding Structural Analysis of Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Coaxial Arc Plasma Deposition, International Forum for Green Asia 2016, 2016.12.
27. Takanori Hanada, Shinya Ohmagari, Abdelrahman Zkria, Tsuyoshi Yoshitake, Barrier Height of Au Contact on p-Type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, International Forum for Green Asia 2016, 2016.12.
28. Satoshi Takeichi, Takashi Nishiyama, Mitsuru Tabara, Shuichi Kawawaki, Masamichi Kohno, Koji Takahashi, Tsuyoshi Yoshitake, Thermal Conductivity Measurements of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films by Time-Domain Thermoreflectance, International Forum for Green Asia 2016, 2016.12.
29. Satoshi Takeichi, Takashi Nishiyama, Mitsuru Tabara, Shuichi Kawawaki, Masamichi Kohno, Koji Takahashi, Tsuyoshi Yoshitake, Thermal conduction evaluation of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films by time-domain thermoreflectance, The 18th Cross Straits Symposium on Energy and Environmental Science & Technology, 2016.12.
30. Rezwan Ahmed, Kazuki Kudo, Satoshi Takeichi, Ken-ichiro Sakai, Masahiko Nishijima, Tsuyoshi Yoshitake, Seigi Mizuno, Fabrication of spin valve junctions comprising Fe3Si/B-doped carbon/Fe trilayers, The 18th Cross Straits Symposium on Energy and Environmental Science & Technology, 2016.12.
31. Kazutoshi Nakashima, Kazuki Kudo, Satoshi Takeichi, Ken-ichiro Sakai, Tsuyoshi Yoshitake, Spin valves comprising nitrogen-doped carbon interlayers, The 18th Cross Straits Symposium on Energy and Environmental Science & Technology, 2016.12.
32. N. Nishikawa, T. Hanada, S. Tategami, A. Iwamoto, S. Takeda, A. Fukuyama, T. Yoshitake, Minority-Carrier Life Time in Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, The 1st Asian Applied Physics Conference, 2016.12.
33. Abdelrahman Zkria, Hiroki Gima, Tsuyoshi Yoshitake, Nitrogen doped Ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by coaxial arc plasma deposition, The 1st Asian Applied Physics Conference, 2016.12.
34. Mohamed Egiza, Hiroshi Naragino, Aki Tominaga, Kouki Murasawa, Hidenobu Gonda, Masatoshi Sakurai, Tsuyoshi Yoshitake, Application of hard coating ultrananocrystalline diamond/amorphous carbon composite films prepared by coaxial arc plasma deposition on tungsten carbide, The 1st Asian Applied Physics Conference, 2016.12.
35. T. Hanada, S. Ohmagari, A. Zkria, T. Yoshitake, Photoconductivities in Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
36. T. Hanada, S. Ohmagari, A. Zkria, T. Yoshitake, Direct Determination of the Barrier Height of Au Contact on p-Type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
37. A. Zkria, T. Yoshitake, Heterojunction Diodes Comprising Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogentad Amorphous Carbon and p-Type Silicon, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
38. Y. Katamune, S. Takeichi, S. Al Riyami, and T. Yoshitake, Defect Structures of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared By Physical Vapor Deposition , Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
39. H. Gima, A. Zkria, T. Yoshitake , Spectroscopic Analysis of Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared By Coaxial Arc Plasma Deposition, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
40. M. Egiza, H. Naragino, A. Tominaga, K. Murasawa, H. Gonda, M. Sakurai, T. Yoshitake, Effects of Deposition Temperature on Synthesis of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films on Cemented Carbide Substrate By Coaxial Arc Plasma Deposition, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
41. S. Takeichi, T. Nishiyama, M. Kohno, K. Takahashi, Y. Katamune, T. Yoshitake, Thermal Conductivity of Ultrananocrystalline Diamond/Nonhydrogenated Amorphous Carbon Composite Films Prepared By Coaxial Arc Plasma Deposition, Pasific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)/230th ECS Meeting, 2016.10.
42. Tsuyoshi Yoshitake, Kazutoshi Nakashima, Kazuki Kudo, Kazuya Ishibashi, Yuki Asai, Ken-ichiro Sakai, Hiroyuki Deguchi, Spin Valve Junctions Comprising Fe-Si Materials, Asia-Pacific Conference on Semiconducting Silicides and Related Materials Science and Technology Towards Sustainable Electronics ( APAC Silicide 2016 ) , 2016.07.
43. Kazuki Kudo, Kazuya Ishibashi, Kazutoshi Nakashima, Yuki Asai, Ken-ichiro Sakai, Hiroyuki Deguchi, Tsuyoshi Yoshitake, Temperature-Dependent Magnetoresistance Effects in Fe3Si/FeSi2/Fe3Si Trilayered Spin Valve Junctions
, Asia-Pacific Conference on Semiconducting Silicides and Related Materials Science and Technology Towards Sustainable Electronics ( APAC Silicide 2016 ), 2016.07.
44. Kazuki Kudo, Satoshi Takeichi, Hirokazu Kishimoto, Ken-ichiro Sakai, Hiroyuki Deguchi, Tsuyoshi Yoshitake, Fe/boron-doped Ultrananocrystalline Diamond/Fe Trilayered Spin Valve Junctions, Asia-Pacific Conference on Semiconducting Silicides and Related Materials Science and Technology Towards Sustainable Electronics ( APAC Silicide 2016 ), 2016.07.
45. Tomohiro Nogami, Ryuji Baba, Hirokazu Kishimoto, Tarek M. Mostafa, Nathaporn Promros, Tsuyoshi Yoshitake, Effects of Nitrogen Doping on Optical and Electrical Properties of FeSi2 Films Prepared by Sputtering, Asia-Pacific Conference on Semiconducting Silicides and Related Materials Science and Technology Towards Sustainable Electronics ( APAC Silicide 2016 ), 2016.07.
46. Aki Tominaga, Ruji Baba, Hirokazu Kishimoto, Tarek Mostafa, Hiroshi Naragino, Kazutaka Kamitani, Toshihiro Okajima, Tsuyoshi Yoshitake, EXAFS Study on Nitrogen-doped Nanocrystalline FeSi2 Films Prepared by Sputtering, Asia-Pacific Conference on Semiconducting Silicides and Related Materials Science and Technology Towards Sustainable Electronics ( APAC Silicide 2016 ), 2016.07.
47. Abdelrahman Zkria Ahmed, Tsuyoshi Yoshitake, Low-temperature carrier transport properties of n-type ultrananocrystalline diamond/ptype Si heterojunction diodes, The 2016 Compound Semiconductor Week (CSW2016), June 26-30, 2016, , Japan, 2016.06.
48. M. Egiza, H. Naragino, A. Tominaga, K. Murasawa, H. Gonda, M. Sakurai, T. Yoshitake, Effects of B doping on growth and mechanical properties of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films on Cemented Carbide Substrate by Coaxial Arc Plasma Deposition, Advanced Metallization Conference 2016, 2016.06.
49. A. Zkria, H. Gima, T. Hanada, T. Yoshitake, Evaluation of nitrogen-doped Ultrananocrystalline diamond /p -type silicon diodes, Advanced Metallization Conference 2016, 2016.06.
50. Abdelrahman Zkria, Hiroki Gima, Tsuyoshi Yoshitake, Nitrogen-doping Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon composite films Prepared by Coaxial Arc Plasma Deposition, The 3rd International Conference on Advanced Electromaterials (ICAE2015), 2015.11.
51. Abdelrahman Zkria, Fouad Abdel-Wahab, Tsuyoshi Yoshitake, Ellipsometric studies of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Deposited by a Coaxial Arc Plasma Gun, The 3rd International Conference on Advanced Electromaterials (ICAE2015), 2015.11.
52. Nathaporn Promros, Phongsaphak Sittimart, Ryuji Baba, Takanori Hanada, Kenji Hanada, Motoki Takahara, Tarek M. Mostafa, Li Chen, Tsuyoshi Yoshitake, Characterization of n-Type Nanocrystalline Iron Disilicide/Intrinsic Ultrananocrystalline Diamond/Amorphous Carbon Composite/p-Type Silicon Heterojunctions at Low Temperatures, The 3rd International Conference on Advanced Electromaterials (ICAE2015), 2015.11.
53. Takanori Hanada, Nathaporn Promros, Shinya Ohmagari, Tsuyoshi Yoshitake, Photodetection in Heterojunction Photodiodes Comprising p-Type B-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films and n-Type Silicon at Low Temperatures, The 3rd International Conference on Advanced Electromaterials (ICAE2015), 2015.11.
54. Kazuya Ishibashi, Kazutoshi Nakashima, Ken-ichiro Sakai, Tsuyoshi Yoshitake, Fabrication of spin valve junctions based on Fe/Fe3Si/FeSi2/Fe3Si quadrilayered films by facing targets direct-current sputtering, 68th Annual Gaseous Electronics Conference/9th International Conference on Reactive Plasmas/33rd Symposium on Plasma Processing, 2015.10.
55. Mohamed Egiza, Hiroshi Naragino, Aki Tominaga, Kouki Murasawa, Hidenobu Gonda, Masatoshi Sakurai, Tsuyoshi Yoshitake, ULTRANANOCRYSTALLINE DIAMOND/AMORPHOUS CARBON COMPOSITE FILMS SYNTHESIS ON CEMENTED CARBIDE SUBSTRATE BY COAXIAL ARC PLASMA DEPOSITION, Intellectual Exchange and Innovation Conference on Engineering & Sciences (IEICES), 2015.10.
56. Abdelrahman Zkria, Tsuyoshi Yoshitake, Heterojunction Diodes of Nitrogen-Doped Ultrananocrystalline Diamond Films Prepared by Coaxial Arc Plasma Deposition, Intellectual Exchange and Innovation Conference on Engineering & Sciences (IEICES), 2015.10.
57. Kazuya Ishibashi, Kazutoshi Nakashima, Ken-ichiro Sakai, Tsuyoshi Yoshitake, Magnetic properties of Fe/FeSi2/Fe3Si trilayered films prepared by facing targets sputtering deposition, 68th Annual Gaseous Electronics Conference/9th International Conference on Reactive Plasmas/33rd Symposium on Plasma Processing, 2015.10.
58. Abdelrahman Zkria, Tsuyoshi Yoshitake, Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films/p-Silicon heterojunction, 68th Annual Gaseous Electronics Conference/9th International Conference on Reactive Plasmas/33rd Symposium on Plasma Processing, 2015.10.
59. Hiroki Gima, Hitoshi Umezawa, Khaled Driche, Yukako Kato, Yoshiaki Mokuno, Fabrice Donatini, Etienne Gheereart, Tsuyoshi Yoshitake, Electron-Beam-Induced Current Evaluation of Electric Field Enhancement on Diamond Schottky Barrier Diode, 3rd French-Japanese Workshop on Diamond Power Devices, 2015.07.
60. Hiroki Gima, Tsuyoshi Yoshitake, Effect of Nitrogen Incorporation into Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Fabricated by Coaxial Arc Plasma Deposition Method, 3rd French-Japanese Workshop on Diamond Power Devices, 2015.07.
61. Hiroshi Naragino, Mohamed Egiza, Aki Tominaga, Tsuyoshi Yoshitake, Fabrication of Nanodiamond Powders and Hard Ultrananocrystalline/nonhydrogenated Amorphous Carbon Composite Films Using Coaxial Arc Plasma Gun, 3rd French-Japanese Workshop on Diamond Power Devices, 2015.07.
62. Tsuyoshi Yoshitake, Widely-variable electrical conductivity of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by PVD, 3rd French-Japanese Workshop on Diamond Power Devices, 2015.07.
63. Tsuyoshi Yoshitake, Preparation of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Physical Vapor Deposition and Their Application to Photodiodes and Hard Coating, Hasselt Diamond Workshop 2015 SBDD XX, 2015.02.
64. Motoki Takahara, Tsuyoshi Yoshitake, Fabrication of n-Type beta-FeSi2/p-Type Si Heterojunction Diodes for Near-Infrared Light Detection, The first Joint Symposium of Kyushu University and Yonsei University on materials Science and Chemical Engineering (SKY-1), 2015.02.
65. Motoki Takahara, Tsuyoshi Yoshitake, Fabrication of n-Type beta-FeSi2/p-Type Si Heterojunction Diodes for Near-Infrared Light Detection, The first Joint Symposium of Kyushu University and Yonsei University on materials Science and Chemical Engineering (SKY-1), 2015.02.
66. Tsuyoshi Yoshitake, Preparation of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Physical Vapor Deposition and Their Application to Photodiodes and Hard Coating, The first Joint Symposium of Kyushu University and Yonsei University on materials Science and Chemical Engineering (SKY-1), 2015.02.
67. Hiroshi Naragino, Aki Tominaga, Kazushi Sumitani, Satoru Hattori, Tsuyoshi Yoshitake, Synthesis and Evaluation of Nanocrystalline Diamond Powder Prepared by Coaxial Arc Plasma Gun, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
68. Tsuyoshi Yoshitake, Ken-ichiro Sakai, Yuki Asai, Kazuya Ishibashi, Yuta Noda, Kaoru Takeda, Spin Valve Junctions Based on Fe3Si/FeSi2/Fe3Si Trilayered Films, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
69. Tsuyoshi Yoshitake, Ken-ichiro Sakai, Yuki Asai, Kazuya Ishibashi, Yuta Noda, Kaoru Takeda, Spin Valve Junctions Based on Fe3Si/FeSi2/Fe3Si Trilayered Films, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
70. Tsuyoshi Yoshitake, Yuki Katamune, Takanori Hanada, Satoshi takeichi, Shinya Ohmagari, Application of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films to Photodiodes, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
71. Tsuyoshi Yoshitake, Mahmoud Shaban, Nathaporn Promros, Motoki Takahara*, T.M. Miostafa, Ryuji Baba, Near Infrared Photodiodes Comprising Iron Disilicides Prepared by Sputtering, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
72. Nathaporn Promros, Kenji Hanada, P. Sittimart, Motoki Takahara, Takanori Hanada, Li Chen, Tsuyoshi Yoshitake, Electrical Transport Properties and Photodetection Performances of n-Type NC-FeSi2/i-UNCD/a-C/p-Type Si Heterojunction Photodiodes at Low Temperatures, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
73. Aki Tominaga, Hiroshi Naragino, Hiroyuki Deguchi, Kaoru Takeda, Tsuyoshi Yoshitake, Nanocrystalline Diamond Powder Fabricated using Coaxial Arc Plasma Equipped with Chromium-Blended Graphite Targets, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014.12.
74. Mohamed Egiza , Hiroshi Naragino , 冨永 亜希, 吉武 剛, 村澤功其, 権田英修, Deposition of Hard Carbon Thin Films on Cemented Carbide by Coaxial Arc Plasma Deposition, 2 0 1 4 年( 平成2 6 年度)応用物理学会九州支部学術講演会, 2014.12.
75. Hiroki Gima, Abdelrahman Zkria, Sausan Al-Riyami, Aki Tominaga, Tsuyoshi Yoshitake, Chemical Bonding Structures of Nitrogen-doping Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon composite films Prepared by Coaxial Arc Plasma Deposition, 2014 MRS Fall Meeting, 2014.12.
76. Abdelrahman Zkria, Hiroki Gima, Mahmoud Shaban, Tsuyoshi Yoshitake, Fabrication of heterojunction diodes comprising nitrogen-doped ultrananocrystalline diamond/amorphous carbon and p-type silicon, 2014 MRS Fall Meeting, 2014.12.
77. Hiroki Gima, Tsuyoshi Yoshitake, Heterojunction Diodes Comprising Nitrogen-doped Ultrananocrystalline Dia-mond Films Prepared by Coaxial Arc Plasma Deposition and p-Type Silicon Substrates, International Forum for Green Asia 2014, Nov. 28-29, 2014, Kyushu University, Fukuoka, Japan., 2014.11.
78. Hiroki Gima, Tsuyoshi Yoshitake, Heterojunction Diodes Comprising Nitrogen-doped Ultrananocrystalline Dia-mond Films Prepared by Coaxial Arc Plasma Deposition and p-Type Silicon Substrates, International Forum for Green Asia 2014, Nov. 28-29, 2014, Kyushu University, Fukuoka, Japan., 2014.11.
79. Takanori Hanada, Tsuyoshi Yoshitake, Photoconduction of B-doped ultrananocrystalline diamond/hydrogenated amorphous carbon composite films in metal semiconductor metal geometry , International Forum for Green Asia 2014, Nov. 28-29, 2014, Kyushu University, Fukuoka, Japan., 2014.11.
80. Takanori Hanada, Tsuyoshi Yoshitake, Photoconduction of B-doped ultrananocrystalline diamond/hydrogenated amorphous carbon composite films in metal semiconductor metal geometry , International Forum for Green Asia 2014, Nov. 28-29, 2014, Kyushu University, Fukuoka, Japan., 2014.11.
81. Hiroshi Naragino, Aki Tominaga, Satoru Hattori, Tsuyoshi Yoshitake, Fabrication of Ultrananocrystalline Diamond Powder by Using A Coaxial Arc Plasma Gun, International Forum for Green Asia 2014, Nov. 28-29, 2014, Kyushu University, Fukuoka, Japan., 2014.11.
82. Yuki Katamune, Al-Riyami Sausan, Shinya Ohmagari, Seishi Takagi, Tsuyoshi Yoshitake, Structural Characterization of Boron-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Film, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
83. Aki Tominaga, Hiroshi Naragino, Kenji Hanada, Hiroyuki Deguchi, Kaoru Takeda, Tsuyoshi Yoshitake, Magnetization of ultrananocrystalline diamond powder by Cr-doping, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
84. Ken-ichiro Sakai, Yuki Asai, Yuta Noda, Kazuya Ishibashi, Kaoru Takeda, Tsuyoshi Yoshitake, CPP Junctions Fabricated From Fe3Si/FeSi2 Artificial Lattices by FIB, 27th International Microprocesses and Nanotechnology Conference (MNC2014), 2014.11.
85. Tomohiro Yoshida, Yutaro Ueda, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Film Structures of β-AlN Thin Films Grown on Sapphire (0001) by Pulsed Laser Deposition, 27th International Microprocesses and Nanotechnology Conference (MNC2014), 2014.11.
86. Hiroshi Naragino, Aki Tominaga, Satoru Hattori, Tsuyoshi Yoshitake, Formation of Nanodiamond Powder Prepared Using A Coaxial Arc Plasma Gun, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
87. Tomohiro Yoshida, Kenji Hanada, Hiroyuki Setoyama, Kazushi Sumitani, Tsuyoshi Yoshitake, Repetition Rate Effects on Mechanical Properties of Ultrananocrystalline Diamond/hydrogenated Amorphous Carbon Fabricated by Arc Plasma Deposition, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
88. Motoki Takahara, T.M. Mostafa, Ryuji Baba, Suguru Funasaki, Mahmoud Shaban, Nathaporn Promros, Tsuyoshi Yoshitake, Effects of carbon-doping of n-type β-FeSi2/p-type Si heterojunction diodes, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
89. Yuki Asai, Ken-ichiro Sakai, Kazuya Ishibashi, Noda Yuta, Kaoru Takeda, Tsuyoshi Yoshitake, Magnetoresistance Effects in Current-Perpendicular-to-Plane Structures Based on Fe3Si/FeSi2 artificial lattices, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
90. Tomohiro Yoshida, Yutaro Ueda, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Film growth of Single layer β-AlN Grown on Sapphire by Pulsed Laser Deposition, The 7th International Symposium on Surface Science (ISSS-7), 2014.11.
91. Tsuyoshi Yoshitake, Yuki Katamune, Takanori Hanada, Hiroki Gima, Abdelrahman M. Ahmed, Shinya Ohmagari, Sausan Al-Riyami, Kenji Hanada, Growth of UNCD/a-C:H composite films by PVD and their electrical conductivity control, Japan-France Workshop on Diamond Power Devices, 2014.10.
92. アブデルラーマン ゼクリア, 儀間弘樹, サウサン アリヤミ, マハムド シャバーン, 吉武 剛, Heterojunction diodes comprising nitrogen-doped ultrananocrystalline diamond/amorphous carbon and p-type silicon, 2014年第75回応用物理学会秋季学術講演会, 2014.09.
93. Shinya Ohmagari, Sausan Al-Riyami, Yuki Katamune, Takanori Hanada, Tsuyoshi Yoshitake, Formation of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films and Their Application to Photodetectors , The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
94. Kazushi Sumitani, Satoru Hattori, Hiroshi Naragino, Aki Tominaga, Tsuyoshi Yoshitake, Evaluation of the density of ultrananocrystalline diamond/amorphous carbon composite films prepared by pulsed laser deposition using synchrotron X-ray Reflectivity measurements, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
95. Tomohiro Yoshida, Yutaro Ueda, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Structural Evaluation of beta-AlN Films Grown on Sapphire (0001) , The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
96. Aki Tominaga, Hiroshi Naragino, Kenji Hanada, Takeharu Sugiyama, Tsuyoshi Yoshitake, Nanodiamond Powder Prepared Using A Coaxial Arc Plasma Gun, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
97. Ken-ichiro Sakai, Yuki Asai, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Current -induced magnetization switching induced at low current densities in current -perpendicular-to -plane structural Fe3Si/FeSi2 artificial lattices, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
98. Ken-ichiro Sakai, Hiroyuki Deguchi, Yuki Asai, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Temperature-dependent interlayer coupling in Fe3Si/FeSi2 artificial lattices, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
99. Ken-ichiro Sakai, Hiroyuki Deguchi, Yuki Asai, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Temperature-dependent interlayer coupling in Fe3Si/FeSi2 artificial lattices, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
100. Takanori Hanada, Shinya Ohmagari, Tsuyoshi Yoshitake, Photodetection in Metal-Semiconductor-Metal Structures Comprising Semiconducting Boron-doped UNCD/a-C:H, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
101. Yuki Katamune, Shinya Ohmagari, Tsuyoshi Yoshitake, Effects of Hydrogenation on Electrical Properties and Chemical Bonding Structure of Boron-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
102. Hiroshi Naragino, Aki Tominaga, Kenji Hanada, Kazutaka Kamitani, Takeharu Sugiyama, Kaoru Takeda, Hiroyuki Deguchi, Tsuyoshi Yoshitake, Effects of Hydrogenation on Electrical Properties and Chemical Bonding Structure of Boron-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
103. Abdelrahman Zkria, Mahmoud Shaban, Hiroki Gima, Al-Riyami Sausan, Tsuyoshi Yoshitake, Ultraviolet Photodetection of Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films at Low Temperatures, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
104. Hiroki Gima, Al-Riyami Sausan, Mahmoud Shaban, Tsuyoshi Yoshitake, Electrical Properties of Nitrogen-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Fabricated by Coxial Arc Plasma Depostion, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
105. Tarek M. Mostafa, Suguru Funasaki, Motoki Takahara, Mahmoud Shaban, Tsuyoshi Yoshitake, Effect of Growth Temperature on Electrical Properties of Carbon-doped β-FeSi2/Si Heterojunctions, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
106. Mahmoud Shaban, Suguru Funasaki, Tarek M. Mostafa, Motoki Takahara, Tsuyoshi Yoshitake, Low Temperature Characteristics of Carbon-doped β-FeSi2/Si Heterojunctions Prepared by RF Magnetron Sputtering, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
107. Nathaporn Promros, Suguru Funasaki, Motoki Takahara, Ryuhei Iwasaki, Mahmoud Shaban, Tsuyoshi Yoshitake, Investigation of Current Transport Mechanism in n-Type β-FeSi2/p-Type Si Heterojunctions Prepared by Facing-Targets Direct-Current Sputtering, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
108. Nathaporn Promros, Suguru Funasaki, Motoki Takahara, Ryuhei Iwasaki, Mahmoud Shaban, Tsuyoshi Yoshitake, Investigation of Current Transport Mechanism in n-Type β-FeSi2/p-Type Si Heterojunctions Prepared by Facing-Targets Direct-Current Sputtering, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
109. Nathaporn Promros, Suguru Funasaki, Motoki Takahara, Ryuhei Iwasaki, Mahmoud Shaban, Tsuyoshi Yoshitake, Current Transport Mechanism in Mesa Structural Nanocrystalline-FeSi2/Si /Si Heterojunctions Prepared by Liftoff Photolithography, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
110. Nathaporn Promros, Suguru Funasaki, Motoki Takahara, Ryuhei Iwasaki, Mahmoud Shaban, Tsuyoshi Yoshitake, Electrical Characteristics of Carbon-Doped Nanocrystalline-FeSi2/Si Heterojunction Photodiodes, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
111. Nathaporn Promros, Suguru Funasaki, Motoki Takahara, Ryuhei Iwasaki, Mahmoud Shaban, Tsuyoshi Yoshitake, Electrical Characteristics of Carbon-Doped Nanocrystalline-FeSi2/Si Heterojunction Photodiodes, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014), 2014.08.
112. Tarek M. Mostafa, Mahmoud Shaban, Motoki Takahara, Suguru Funasaki, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Extended X-ray Absorption Find-Structure Investigation of Carbon-Doped β-FeSi2, 九州シンクロトロン光研究センター合同シンポジウム, 2014.08.
113. Yuki Asai, Ken-ichiro Sakai, Kazuya Ishibashi, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Formation of spin valve junctions based on Fe3Si/FeSi2/Fe3Si artificial films, International conference and summer school on advanced silicide technology 2014, 2014.07.
114. Ken-ichiro Sakai, Yuki Asai, Yuta Noda, Hiroyuki Deguchi, Kaoru Takeda, Tsuyoshi Yoshitake, Temperature-dependent interlayer coupling in Fe3Si/FeSi2 artificial lattices, International conference and summer school on advanced silicide technology 2014, 2014.07.
115. Yuki Asai, Ken-ichiro Sakai, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Current-induced-magnetization switching at low current densities in current-perpendicular-to-plane structural Fe3Si/FeSi2 artificial lattices, International conference and summer school on advanced silicide technology 2014, 2014.07.
116. Ken-ichiro Sakai, Yuki Asai, Yuta Noda, Kaoru Takeda, Tsuyoshi Yoshitake, Magnetoresistance effects in current-perpendicular-to-plane structures based on Fe3Si/FeSi2 artificial lattices, International conference and summer school on advanced silicide technology 2014, 2014.07.
117. Motoki Takahara, Suguru Funasaki, Trarek M. Mostafa, Mahmoud Shaban, Nathaporn Promros, Tsuyoshi Yoshitake, Electric properties of carbon-doped n-type β-FeSi2/p-type Si heterojunction diodes, International conference and summer school on advanced silicide technology 2014, 2014.07.
118. Trarek M. Mostafa, Mahmoud Shaban, Motoki Takahara, Suguru Funasaki, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Extended X-ray absorption fine-structure study of carbon-doped β-FeSi2, International conference and summer school on advanced silicide technology 2014, 2014.07.
119. Trarek M. Mostafa, Mahmoud Shaban, Motoki Takahara, Suguru Funasaki, Aki Tominaga, Toshihiro Okajima, Tsuyoshi Yoshitake, Extended X-ray absorption fine-structure study of carbon-doped β-FeSi2, International conference and summer school on advanced silicide technology 2014, 2014.07.
120. Tsuyoshi Yoshitake, Present state of research on photodiodes comprising iron disilicides and problems awaiting solution, International conference and summer school on advanced silicide technology 2014, 2014.07, Semiconducting iron disilicide is a new candidate applicable to near-infrared-wavelength photoelec-tronic devices [1-3], because it possesses features such as a direct optical band gap of 0.85 eV above an indirect gap (0.76 eV) and a large absorption coefficient, which is 10^5 cm1 at 1.0 eV[4]. Since beta-FeSi2 can be epitaxially grown on Si due to small lattice mismatches, a heterojunction diode comprising a beta-FeSi2 thin film and singlecrystalline Si substrate is a device that can be briefly formed by employing vapor deposition. For near-infrared light detection in the Si/beta-FeSi2 heterojunction diodes, near-infrared light transmitted through the front-side Si substrate can be absorbed in the depletion region of the back-side beta-FeSi2 thin film.
In our previous works, we have progresses researches on p-type Si/n-type beta-FeSi2 heterojunction diodes, totally from the epitaxially growth of beta-FeSi2 thin film on Si(111) by sputtering [5] to the evaluation of p-type Si/n-type beta-FeSi2 heterojunctions as photodetectors [6,7]. It was confirmed that beta-FeSi2 in the heterojunction evidently con-tributes to the photodetection of near-infrared light from the photoresponse spectrum of the heterojunction, as shown in Fig. 1. In addition, as shown in Fig.2, the heterojunction clearly exhibited current due to photogenerated carriers for 1.33 micrometer monochromatic light in the I-V curves in comparison with that in the dark. The detectivity at temperatures lower than 100 K reach approximately 2*10^11 cmHz^1/2 /W, which is comparable with that of existing near infrared photodiodes comprising PbS and InAs at the same temperature. However, the external quantum efficiency is less than 10 % [6,7].
In this presentation, the progress thus far of our research and recent problems that we are facing and should be solved for the next step will be introduced. A serious problem for p-type Si/n-type beta-FeSi2 heterojunctions is that a barrier due to a band offset appears in the valence band and it prevents from the flow of photogenerated carriers from the n-type beta-FeSi2 layer to the p-type Si layer. The opposite combination, namely n-type Si/p-type beta-FeSi2, is structurally ideal because of it has no barriers due to the band offset. In order to form p-type -FeSi2, the residual carrier density should be reduced for controlling the conduction type. Carbon doping, which might be effective for a reduction in the carrier density, will be introduced.

[1] D. Leong, M. Harry, K. J. Reeson, and K. P. Homewood, Nature (London) 387 (1997) 686.
[2] Y. Maeda, T. Akita, K. Umezawa, K. Miyake, M. Sagawa, SPIE Proc. 3419 (1998) 341916.
[3] T. Ootsuka, Y. Fudamoto, M. Osamura, T. Suemasu, Y. Makita, Y. Fukuzawa, and Y. Nakayama, Appl. Phys. Lett. 91 (2007) 142114.
[4] H. Udono, I. Kikuma, T. Okuno, Y. Matsumoto, and H. Tajima: Appl. Phys. Lett. 85 (2004) 1937.
[5] .M. Shaban, S. Izumi, K. Nomoto, and T. Yoshitake, Appl. Phys. Lett. 95 (2009) 162102.
[6] N. Promros, K. Yamashita, S. Izumi, R. Iwasaki, M. Shaban, and T. Yoshitake, Jpn. J. Appl. Phys. 51 (2012) 09MF02.
[7] S. Izumi, M. Shaban, N. Promros, K. Nomoto, and T. Yoshitake, Appl. Phys. Lett. 102 (2013) 032107..
121. Tarek Mostafa, Motoki Takahara, Mahmoud Shaban, Tsuyoshi Yoshitake, Electric properties of Carbon doped β-FeSi2 /Si heterojunction photodiodes, The 61th JSAP Spring Meeting, 2014.03.
122. Suguru Funasaki, Ryuhei Iwasaki, Nathaporn Promros, Mahmoud Shaban, Tsuyoshi Yoshitake, Electrical Properties of Mesa Structural n-type Nanocrystalline-FeSi2/p-type Si Heterojunction Photodiodes, The 15th Cross Straits Symposium on Materials, Energy and Environment Science and Technology, 2013.11.
123. Hiroki Gima, Tsuyoshi Yoshitake, Fabrication of n-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by coaxial arc plasma deposition (II), The 15th Cross Straits Symposium on Materials, Energy and Environment Science and Technology, 2013.11.
124. Yuki Katamune, Tsuyoshi Yoshitake, Boron Doping Effects on Electrical Properties of Ultrananocrystalline Diamond Films Prepared by Coaxial Arc Plasma Deposition, The 15th Cross Straits Symposium on Materials, Energy and Environment Science and Technology, 2013.11.
125. Takanori Hanada, Shinya Ohmagari, Tsuyoshi Yoshitake, Metal-Semiconductor-Metal Photodetection of Boron-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, The 15th Cross Straits Symposium on Materials, Energy and Environment Science and Technology, 2013.11.
126. Yuki Katamune, Tsuyoshi Yoshitake, Photovoltaic Characteristics of Heterojunction Diode Comprising Boron-Doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Film and n-Type Silicon, 2013 International Conference on SOLID STATE DEVICES AND MATERIALS, 2013.09.
127. Hiroki Gima, Sausan Al-Riyami, Tsuyoshi Yoshitake, UV detection of n-type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films by Coaxial Arc Plasma Deposition, 2013 International Conference on SOLID STATE DEVICES AND MATERIALS, 2013.09.
128. Takanori Hanada, Shinya Ohmagari, Tsuyoshi Yoshitake, Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films for Metal-Semiconductor-Metal Photodetector, 2013 International Conference on SOLID STATE DEVICES AND MATERIALS, 2013.09.
129. Hiroki Gima, Sausan Al-Riyami, Tsuyoshi Yoshitake, UV Detection of Nitrogen-doped Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films, 2013 JSAP-MRS Joint Symposia, 2013.09.
130. Yuki Katamune, Tsuyoshi Yoshitake, Boron Doping Effects on Electrical Properties of Ultrananocrystalline Diamond Films Prepared by Coaxial Arc Plasma Deposition, 2013 JSAP-MRS Joint Symposia, 2013.09.
131. Takanori Hanada, Shinya Ohmagari, Tsuyoshi Yoshitake, Photoconduction of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films in metal-semiconductor-metal geometry, 2013 JSAP-MRS Joint Symposia, 2013.09.
132. Suguru Funasaki, Ryuhei Iwasaki, Nathaporn Promros, Tsuyoshi Yoshitake, Characteristics of Mesa Structural Near-Infrared n-Type Nanocrystalline FeSi2/p-Type Si Heterojunction Photodiodes, Asia-Pacific Conference on Green Technology with Silicides and Related Materials (APAC-SILICIDE 2013), 2013.07.
133. Ken-ichiro Sakai, Yuta Noda, Daiki Tsumagari, Kaoru Takeda, Tsuyoshi Yoshitake, Current-induced Magnetization Switching in Fe3Si/FeSi2/Fe3Si Trilayer films, Asia-Pacific Conference on Green Technology with Silicides and Related Materials (APAC-SILICIDE 2013), 2013.07.
134. Sausan Al-Riyami, Hiroyuki Setoyama, Kazushi Sumitani, yasuharu Hirai, Aki Tominaga, Tsuyoshi Yoshitake, Growth of Nonhydrogenated Ultrananocrystalline Diamond/Amorphous Carbon Films in Nitrogen Atmospheres by Pulsed Laser Ablation of Graphite Targets, E-MRS 2013 SPRING MEETING, Symposium V: Laser materials interactions for micro and nano applications, 2013.05.
135. Hikaru Ichinose, Sausan Al-Riyami, Tsuyoshi Yoshitake, Hardness Enhancement of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films by Silicon Doping , E-MRS 2013 SPRING MEETING, Symposium S: Protective coatings and thin films’13, 2013.05.
136. Ken-ichiro Sakai, Yuta Noda, Daiki Tsumagari, Takayuki Sonoda, Shin-ichi Hirakawa, Kaoru Takeda, Tsuyoshi Yoshitake, Magnetoresistance Effects in Current-Perpendicular-to-Plane Structures based on Fe3Si/FeSi2 artificial lattices , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
137. Ken-ichiro Sakai, Yuta Noda, Daiki Tsumagari, Hiroyuki Deguchi, Kaoru Takeda, Tsuyoshi Yoshitake, Temperature-dependent interlayer coupling in Fe3Si/FeSi2 artificial lattices, E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
138. Takanori Hanada, Shinya Ohmagari, Tsuyoshi Yoshitake, Photoconduction studies of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by pulsed laser deposition, E-MRS 2013 SPRING MEETING, Symposium D: Advanced inorganic materials and structures for photovoltaics, 2013.05.
139. Suguru Funasaki, Ryuhei Iwasaki, Nathaporn Promros, Tsuyoshi Yoshitake, Characterization of Mesa Structural Near-Infrared n-Type Nanocrystalline Iron Disilicides/p-Type Si Heterojunction Photodiodes , E-MRS 2013 SPRING MEETING, Symposium J: Semiconductor nanostructures towards electronic and optoelectronic device applications - IV, 2013.05.
140. Yuki Katamune, Shinya Ohmagari, Sausan Al-Riyami, Seishi Takagi, Tsuyoshi Yoshitake, Chemical bonding structures and electrical properties of boron-doped ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by coaxial arc plasma deposition , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
141. Yuki Katamune, Shinya Ohmagari, Tsuyoshi Yoshitake, Electrical properties of heterojunction diodes comprising p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films and n-type Silicon substrates , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
142. Aki Tominaga, Hiroshi Naragino, Kenji Hanada, Tsuyoshi Yoshitake, Chromium-doped nanocrystalline diamond powder fabricated using coaxial arc plasma equipped with chromium-blended graphite targets , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
143. Aki Tominaga, Hiroshi Naragino, Kenji Hanada, Tomohiro Yoshida, Tsuyoshi Yoshitake, Fabrication of Diamond Nanocrystallites in Powder Using Coaxial Arc Plasma Gun , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
144. Tomohiro Yoshida, Yutaro Ueda, Kazushi Sumitani, Toshihiro Okajima, Aki Tominaga, Tsuyoshi Yoshitake, Cubic AlN Films Epitaxially Grown on Sapphire(0001) in Nitrogen Atmospheres by Pulsed Laser Deposition with Sintered AlN Targets , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
145. Hiroki Gima, Sausan Al-Riyami, Tsuyoshi Yoshitake, n-Type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared By Coaxial Arc Plasma Deposition , E-MRS 2013 SPRING MEETING, Symposium N: Atomic-scale engineering of multifunctional nano-sized materials and films, 2013.05.
146. Shinya Ohmagari, Tsuyoshi Yoshitake, Electrical and optical properties of boron-doped p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films prepared by pulsed laser deposition, Hasselt Diamond Workshop 2013 SBDD XVIII, 2013.02.
147. Shinya Ohmagari, Takanori Hanada, Sausan Al-Riyami, Tsuyoshi Yoshitake, Ultrananocrystalline diamond/hydrogenated amorphous carbon composite films for photovoltaic applications, Hasselt Diamond Workshop 2013 SBDD XVIII, 2013.02.
148. Shinya Ohmagari, Sausan Al-Riyami, Tsuyoshi Yoshitake, Photoconduction in ultrananocrystalline diamond/hydrogenated amorphous carbon composite films evaluated in metal-semiconductor-metal geometry, Hasselt Diamond Workshop 2013 SBDD XVIII, 2013.02.
149. Nathaporn Promros, Ryuhei Iwasaki, Suguru Iwasaki, Kyohei Yamashita, Tsuyoshi Yoshitake, Preparation of Mesa Structural Near-Infrared n-Type Nanocrystalline-FeSi2/p-Type Si Heterojunction Photodiodes, The 15th International Conference of International Academy of Physical Sciences, 2012.12.
150. Yutaro Ueda, Tomohiro Yoshida, Eiichi Kobayashi, Kazushi Sumitani, Toshihiro Okajima, Aki Tominaga, Tsuyoshi Yoshitake, Structure evolution of Cubic AlN Films Epitaxially grown on Sapphire(0001) by pulsed laser deposition, International Workshop on Nitride Semiconductors 2012, 2012.10.
151. Sausan Al-Riyami, Tsuyoshi Yoshitake, Nitrogen Incorporated Ultrananocrystalline Diamond/Nonhydrogenated Amorphous Carbon Composite Films Prepared by Pulsed Laser Deposition, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
152. Sausan Al-Riyami, Hiroyuki Setoyama, Kazushi Sumitani, Yusuharu Hirai, Tsuyoshi Yoshitake, n-Type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Pulsed Laser Deposition, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
153. Ryuhei Iwasaki, Kyohei Yamashita, Nathaporn Promros, Shota Izumi, Tsuyoshi Yoshitake, Near-Infrared Light Detection of n-Type β-FeSi2/i-Si/p- Type Si Heterojunction Photodiodes at Low Temperatures, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
154. Ryuhei Iwasaki, Kyohei Yamashita, Nathaporn Promros, Shota Izumi, Tsuyoshi Yoshitake, Influences of Hydrogen Passivation on Near-Infrared Light Detection of n-Type β-FeSi2/p-Type Si Heterojunction Photodiodes, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
155. Yuta Noda, Takayuki Sonoda, Ken-ichiro Sakai, Kaoru Takeda, Tsuyoshi Yoshitake, Current-Induced Magnetization Switching in CPP Junctions based on Fe3Si/FeSi2 Multilayered Films, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
156. Kenji HANADA, Aki Tominaga, Takeharu Sugiyama, Kazushi Sumitani, Hiroyuki Setoyama, Tsuyoshi Yoshitake, Enhancement of Diamond Crystallite Size of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films by Controlling Arc Discharge Energy of Coaxial Arc Plasma Gun, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
157. 片宗優貴, 大曲新矢, Kazushi Sumitani, Hiroyuki Setoyama, Yasuharu Hirai, Tsuyoshi Yoshitake, p-Type Semiconducting Properties of Boron Doped Ultrananocrystalline Diamond/Amorphous Carbon Composite Films Prepared by Coaxial Arc Plasma Deposition, Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2012), 2012.10.
158. Sausan Al-Riyami, Tsuyoshi Yoshitake, Nitrogen-Doped Ultrananocrystalline Diamond/Hydrogen-Free Amorphous Carbon Composite Films Prepared by Pulsed Laser Deposition, IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012), 2012.09.
159. Shinya Ohmagari, Tsuyoshi Yoshitake, Photodetection properties of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films, IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012), 2012.09.
160. Sausan Al-Riyami, Tsuyoshi Yoshitake, Hetrojunction Diodes Comprised of p-Type Si/n-Type UNCD:a-C:H Composite Film Prepared by Pulsed Laser Deposition, IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012), 2012.09.
161. Tsuyoshi Yoshitake, Ecologically Friendly Semiconductors: Iron Disilicides and Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon, IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012), 2012.09.
162. Tsuyoshi Yoshitake, Applications of Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films to Photodetectors , 1st NUS-IMCE Workshop in Kyushu, 2012.06.
163. , [URL].