Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Yasukazu Murakami Last modified date:2021.10.29

Professor / Quantum Sciences of Materials / Department of Applied Quantum Physics and Nuclear Engineering / Faculty of Engineering


Papers
1. T. Tamaoka, R. Aso, Y. Murakami, Magnetism of Antiphase Boundaries in Ordered Alloys Studied using Electron Holography, J. Magn. Magn. Mater., 539 (2021) 168406(1)-168406(8), 2021.07.
2. Y. Horibe; S. Mori; N. Ikeda; K. Yoshii; H. Yoshii; Y. Murakami, Crystallographical and Morphological Changes in Charge-Ordering Transition of RFe2O4 (R: Y, Lu) Investigated by Transmission Electron Microscopy, Ferroelectrics, 584 (2021) in press, 2021.09.
3. V. C. Koesoemadinata, K. Chou, N. S. K. Baharin, W. J. Yahya, M. A. M. Yuzir, F. N. M. Akhir, K. Iwamoto, S. Hata, S. R. B. Aid, N. Othman, T. Ida, Y. Murakami, H. Hara, The Effectiveness of Biological Pretreatment of Oil Palm Empty Fruit Bunch on its Conversion into Bio-Coke, Bioresource Technology Reports, 15 (2021) 100765(1)-100765(7), 2021.07.
4. A.Koyama, S. Miyauchi, K. Morooka, H. Hojo, H. Einaga, Y. Murakami, Analysis of TEM Images of Metallic Nanoparticles using Convolutional Neural Networks and Transfer Learning, J. Magn. Magn. Mater., 538 (2021) 168225(1)-168225(8), 2021.06.
5. F. Ichihashi, T. Tanigaki, T. Akashi, Y. Takahashi, K. Kusada, T. Takehiro, H. Kitagawa, H. Shinada, and Y. Murakami, Improved Efficiency in Automated Acquisition of Atomic-resolution Electron Holograms using Automated Target Detection, Microscopy, 10.1093/jmicro/dfab021, 70 (2021) in press, 2021.06.
6. Hiroshi Nakajima, Toshiaki Tanigaki, Takaaki Toriyama, Mahito Yamamoto, Hidekazu Tanaka, Yasukazu Murakami, Electrostatic Potential Measurement in the Pt/TiO2 Interface using Electron Holography, J. Appl. Phys., 2021.04.
7. Yusuke Asari, Shohei Terada, Toshiaki Tanigaki, Yoshio Takahashi, Hiroyuki Shinada, Hiroshi Nakajima, Kiyoshi Kanie, Yasukazu Murakami, Deep Convolutional Neural Network Image Processing Method Providing Improved Signal-to-Noise Ratios in Electron Holography, Microscopy, 2021.03.
8. Takehiro Tamaoka, Yohsihiro Midoh, Kazuo Yamamoto, Shodai Aritomi, Toshiaki Tanigaki, Masao Nakamura, Koji Nakamae, Masashi Kawasaki, Yasukazu Murakami, Effect of Denoising Electron Holograms by using the Wavelet Hidden Markov Model on the Phase Retrieval—applications to phase-shifting method, AIP Advances, 11, 025135, 2021.01.
9. Youngji Cho, Sujin Lee, Yasuakzu Murakami, Magnetic Flux Density Measurements from Narrow Grain Boundaries Produced in Sintered Permanent Magnets, Microscopy, 10.1093/jmicro/dfaa032, 2020.06.
10. Yoshio Takahashi, Tetsuya Akashi, Atsuko Sato, Toshiaki Tanigaki, Hiroyuki Shinada, Yasukazu Murakami, Automated Acquisition of Vast Numbers of Electron Holograms with Atomic-scale Phase Information, Microscopy, 69, 132-139, 2020.04, 透過電子顕微鏡に関連する手法の中でも、データ収集の自動化が特に難しい電子線ホログラフィー(電子波干渉を通した物質の電場・磁場の微視的計測技術)に対して、10,000点超の画像を大規模取得できる技術を開発した。この性能は、最も自動化が進んでいるクライオ電子顕微鏡法(タンパク質の構造解析技術)に比肩するもので、国内外の研究グループに先んじて技術開発を達成した。(九大・日立製作所の共同研究).
11. Y. Cho, T.T. Sasaki, K. Harada, A. Sato, T. Tamaoka, D. Shindo, T. Ohkubo, K. Hono, Y. Murakami, Magnetic Flux Density Measurements from Grain Boundary Phase in 0.1 at% Ga-doped Nd-Fe-B Sintered Magnet, Scripta Materialia, 178, 533-538, 2020.01, 強力磁石の開発において、学術的・技術的に重要な研究課題である結晶粒界の磁性を、先進的な電子顕微鏡技術を駆使して明らかにした。.
12. Y. Horibe, M. Ishimatsu, S. Takeyama, S. Mori, M. Kudo, and M. Auchi, M. Tanaka, Y. Murakami , Self-assembled lamellar-type nanostructure in manganite spinel (Co,Mn,Fe)3O4, Appl. Phys. Lett., 115 (2019) 232401(1)-232401(5), 2019.12.
13. N. Kawamoto, H. Ono, Y. Terasaki, Y. Fujikawa, Y. Murakami, and D. Shindo, In-Situ Electric Field Observation of Small Precipitates in BaTiO3 Multilayer Ceramic Capacitors, Mater. Trans., 60 (2019) 2109-2113., 2019.07.
14. N. Nakajima, Y. Horibe, S. Mori, and Y. Murakami, Charged domain walls and crystallographic microstructures in hybrid improper ferroelectric Ca3-xSrxTi2O7, Mater. Trans., 60, 2103-2108, Mater. Trans., 60 (2019) 2103-2108., 2019.07.
15. Y. Cho, K. Niitsu, Y. Midoh, K. Nakamae, D. Shindo, J. M. Yang and Y. Murakami, Suppressing Geometric Phase Shift owing to Antiphase Boundaries in Dark-field Electron Holography, Materials Transactions, 10.2320/matertrans.MC201809, 60, 698-703, Mater. Trans. 60, (2019) 698-703., 2019.04.
16. H. Nakajima, D. Matsuki, Y. Fukunaga, T. Toriyama, K. Shigematsu, M. Matsubara, K. Kanie, A. Muramatsu, Y. Murakami, Self-assembled Structure of Dendronized CdS Nanoparticles, Microscopy, 10.1093/jmicro/dfz014, 68, 342-347, 2019.02.
17. S. Genchi, M. Yamamoto, K. Shigematsu, S. Aritomi, R. Nouchi, T. Kanki, K. Watanabe, T. Taniguchi, Y. Murakami, H. Tanaka, Growth of Vanadium Dioxide Thin Films on Hexagonal Boron Nitride Flakes as Transferrable Substrates, Scientific Reports, Sci. Rep. 9, (2019) 2857., 2019.02.
18. Y. Tsuji, T. Kanki, Y. Murakami and H. Tanaka, Single-step Metal-insulator Transition in Thin Film-based Vanadium Dioxide Nanowires with a 20-nm Electrode Gap, Applied Physics Express, Appl. Phys. Exp. 12, (2019) 025003., 2019.01.
19. T. Akashi, Y. Takahashi, K. Harada, T. Onai, Y. Ono, Yoshimasa, H. Shinada, and Y. Murakami, Illumination Semi-angle of 10-9 rad Achieved in a 1.2-MV Atomic-resolution Holography Transmission Electron Microscope, Microscopy, Microscopy 67, (2018) 286-295., 2018.10, 極めて平行性(干渉性)に優れた電子ビームを実現し、電子線ホログラフィーによる電磁場解析の精度を格段に向上させた。.
20. S. Okazoe, Y. Yasaka, M. Kudo, H. Maeno, Y. Murakami and Y. Kimura, Synthesis of Zero-Valent Iron Nanoparticles by Laser Ablation in Formate Ionic Liquid under Atmospheric Conditions, Chemical Communications, Chem. Commun. 54, (2018) 7834-7837., 2018.06.
21. Y. Cho, S. Aritomi, T. Kanki, K. Kinoshita, N. Endo, Y. Kondo, D. Shindo, H. Tanaka, Y. Murakami, Morphology of Phase-separated VO2 Films Deposited on TiO2-(001) Substrate, Mater. Res. Bull., 102 (2018) 289-293, 2018.02.
22. Ryunosuke Sawada, Tomokazu Yamamoto, Kazuhiro Minakuchi, Makoto Nakasako, Kodai Niitsu, Youngji Cho, Ryosuke Kainuma, Yasukazu Murakami, Cellular Microstructures Superposed on Martensite Plates in Mn55.2Ga19.0Cu25.8 Alloy Showing Large Coercivity, Scripta Materialia, 135, 33-36, 135(2017)33-36, 2017.04.
23. K. Niitsu, M. Minakuchi, X. Xu, M. Nagasako, I. Ohnuma, T. Tanigaki, Y. Murakami, D. Shindo, R. Kainuma, Atomic-resolution Evaluation of Microsegregation and Degree of Atomic Order at Antiphase Boundaries in Ni50Mn20In30 Heusler Alloy, Acta Materialia, 122, 166-177, 2017.01.
24. Hiroshi Akamine, So Okumura, S. Farjami, Yasukazu Murakami, Minoru Nishida, Imaging of Surface Spin Textures on Bulk Crystals by Scanning Electron Microscopy, Scientific Reports, 6, 37265(1)-37265(8), 2016.12.
25. Yasukazu Murakami, Kodai Niitsu, Syuhei Kaneko, Toshiaki Tanigaki, Taisuke Sasaki, Zentaro Akase, Daisuke Shindo, Tadakatsu Ohkubo, Kazuhiro Hono, Strain Measurement in Ferromagnetic Crystals using Dark-field Electron Holography, Applied Physics Letters, 109, 193102(1)-193102(5), 2016.11.
26. Yasukazu Murakami, Analysis of electromagneitc field in nanostructures by electron
holography, Proc. 36th Annual NANO Testing Symposium, 19-23, 2016.11.
27. Toshiaki Tanigaki, Ken Harada, Yasukazu Murakami, Kodai Niitsu, Tetsuya Akashi, Yoshio Takahashi, Akira Sugawara, Daisuke Shindo, New Trend in Electron Holography, J. Phys. D: Appl. Phys., 49, 244001(1)-244001(13), 2016.06.
28. Yasukazu Murakami, Toshiaki Suzuki, Satoru Murai, Yoichi Nii, Taka-hisa Arima, Ryosuke Kainuma, Daisuke Shindo, Application of Strain to Orbital-spin-coupled System MnV2O4 at Cryogenic Temperatures within Transmission Electron Microscope, Microscopy, 10.1093/jmicro/dfv377, 2016.05.
29. Yasukazu Murakami, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Strain measurements from Nd2Fe14B grains in sintered magnets using artificial moiré fringes, Acta Materialia, 10.1016/j.actamat.2015.08.058, 101, 101-106, 2015.09.
30. Yasukazu Murakami, Koudai Niitsu, Toshiaki Tanigaki, Ryosuke Kainuma, H. S. Park, Daisuke Shindo, Magnetization Amplified by Structural Disorder within Nanometer-scale Interface Region, Nature Communications, 5, 4133(1)-4133(8), 2014.06.
31. Yasukazu Murakami, Toshiaki Tanigaki, Taisuke Sasaki, Yumu Takeno, H. S. Park, Tsuyoshi Matsuda, Tadakatsu Ohkubo, Kazuhiro Hono, Daisuke Shindo, Magnetism of Ultrathin Intergranular Boundary Regions in Nd-Fe-B Permanent Magnets, Acta Materialia, 71, 370-379, 2014.04.
32. Yasukazu Murakami, Syota Konno, Taka-hisa Arima, Daisuke Shindo, Toshiaki Suzuki, Electric-field-induced Domain Switching in the Charge/orbital-ordered State of Manganite La0.5Sr1.5MnO4, Physical Revew B (Editor's Suggestion), 81, 140102(1)-140102(4), 2010.04.
33. Yasukazu Murakami, Hiroto Kasai, J. J. Kim, Shinichi Mamishin, Daisuke Shindo, Akira Tonomura, Ferromagnetic Domain Nucleation and Growth in Colossal Magnetoresistive Manganite, Nature Nanotechnology, 5, 37-41, 2010.01.
34. Yasukazu Murakami, J. H. Yoo, Daisuke Shindo, Toshiyuki Atou, Masae Kikuchi, Magnetization Distribution in the Mixed-phase State of Hole-doped Manganites, Nature, 423, 965-968, 2003.06.