Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
kazuhiro Yasuda Last modified date:2019.06.20

Associate Professor / Division of Quantum Science of Materials / Department of Applied Quantum Physics and Nuclear Engineering / Faculty of Engineering


Papers
1. Mo Rigen He, Shuai Wang, Ke Jin, Hongbin Bei, Kazuhiro Yasuda, Syo Matsumura, Kenji Higashida, Ian M. Robertson, A comparative characterization of defect structure in NiCo and NiFe equimolar solid solution alloys under in situ electron irradiation, Scripta Materialia, 10.1016/j.scriptamat.2019.03.008, 166, 96-101, 2019.06, Dislocation loops in NiCo and NiFe, both being single-phase, equimolar solid solution alloys, are generated by in situ high-voltage electron irradiation and characterized inside a transmission electron microscope. In addition to the different defect growth rates, the two alloys present dislocation loops with distinct shape evolution and element segregation, which reflect the element-sensitive, intrinsic properties (e.g., defect energetics, lattice distortion, and local ordering) of the alloys. These results provide evidence that the structure and dynamics of radiation-induced defects in concentrated alloys depend on not only the number but also the species of alloying elements..
2. Jean Marc Costantini, Tatsuhiko Ogawa, AKM Saiful I. Bhuian, Kazuhiro Yasuda, Cathodoluminescence induced in oxides by high-energy electrons Effects of beam flux, electron energy, and temperature, Journal of Luminescence, 10.1016/j.jlumin.2018.12.045, 208, 108-118, 2018.04, The cathodoluminescence (CL) induced in four oxide single crystals (α-Al2O3, ZrO2: Y or YSZ, MgAl2O4, and TiO2) by high-energy electrons from 400 keV to 1250 keV was studied as a function of beam parameters (flux and energy). The main CL bands are related to F center (oxygen vacancy) formation by elastic collisions above the threshold displacement energy of oxygen atoms. The beam-intensity dependence is interpreted on the basis of a kinetic-rate model involving F-center formation and annihilation. The temperature effect was also followed from 110 K to 300 K. A broad maximum is found for all bands at about 200 K for sapphire, whereas a monotonous increase with temperature is observed for YSZ. The plots of CL intensity versus temperature are mainly interpreted by the interplay between the thermal dependence of thermalized free-carrier trapping rates and luminescence efficiency. Finally, the dependence of CL intensity on the primary electron energy for F centers in YSZ showing a maximum at about 600 keV is explained on the basis of the interplay between point-defect formation and secondary-electron energy spectra production..
3. Jean Marc Costantini, Gaëlle Gutierrez, Hideo Watanabe, Kazuhiro Yasuda, Seiya Takaki, Gérald Lelong, Maxime Guillaumet, William J. Weber, Optical spectroscopy study of modifications induced in cerium dioxide by electron and ion irradiations, Philosophical Magazine, 10.1080/14786435.2019.1599145, 2019.01, UV-visible absorption spectroscopy and Raman spectroscopy were used to study damage production in cerium dioxide epitaxial films and polycrystalline sintered samples after irradiation with electrons for three energies to span the threshold displacement energies of cerium and oxygen atoms, and 2.4-MeV Cu ions. Neither amorphization nor specific colour-centre bands were detected. Evolutions of the refractive index were derived from the interference fringes in the optical transmission spectra of epilayers after irradiation. No significant change of the refractive index occurred for the 1.0-MeV electron irradiation, whereas a maximum decrease by 28 ± 8% was deduced for the 1.4-MeV and 2.5-MeV energies. These modifications are consistent with ballistic damage on the cerium sublattice for high electron energies producing Ce 3+ ions. However, no significant change of refractive index was found for the Cu ion irradiation. This likely stems from the high rate of Frenkel pair recombination in the collision cascades induced by more energetic recoils than for the electron irradiations, combined with electronic excitations and hole capture on Ce 3+ ions. This study reveals modifications of the electronic structure upon irradiation that could take place in other non-amorphizable oxide systems..
4. Jean Marc Costantini, Gérald Lelong, Maxime Guillaumet, Seiya Takaki, Kazuhiro Yasuda, Color-center formation and thermal recovery in X-ray and electron-irradiated magnesium aluminate spinel, Journal of Applied Physics, 10.1063/1.5055230, 124, 24, 2018.12, We have studied the formation of color centers in magnesium aluminate spinel (MgAl2O4) by X-ray
and electron irradiations near room temperature (RT). For this purpose, Cu Kα radiation and three
electron energies (1.0, 1.4, and 2.5MeV) were used for variable fluences (up to 4.2 × 1018 cm−2). Offline
UV-visible absorption spectra were recorded at RT as well as at low temperature down to 27K after electron irradiation. The dependence of the production rate of F centers (oxygen vacancies) on the electron energy yields a threshold displacement energy of 190 ± 10 eV for oxygen atoms at RT, which is much higher than the determinations by molecular-dynamics simulations. Such a discrepancyis discussed on the basis of available migration data of point defects in spinel. Equipartition of F0 and F+ centers, i.e., the neutral (VO x ) and singly ionized (VO . ) oxygen vacancies, is reached for high electron fluences. Moreover, the evolution of the width of color-center absorption bands versus temperature is interpreted with the classical theory for F centers (neutral halogen vacancies) in alkali halides. The Stokes shifts are deduced from the temperature dependence of the absorption bandwidths of color centers like for alkali halides and alkaline-earth oxides. Finally, isothermal annealing data for long annealing time show a non-zero asymptotic behavior for both F0 and F+ centers. This uncommon behavior is interpreted by charge exchange processes leading to an equilibrium state between those two color centers..
5. S. Yoshioka, K. Tsuruta, T. Yamamoto, K. Yasuda, S. Matsumura, N. Ishikawa, E. Kobayashi, “X-ray absorption near edge structure and first-principles spectrum investigations of cation disordering in MgAl2O4 induced by swift heavy ions “, Physical Chemistry and Chemical Physics, 10.1039/c7cp07591j, 20, 4962-4969, 2018.01, Cationic disorder in MgAl2O4 spinel induced by swift heavy ions was investigated using X-ray absorption near edge structure.With changes of the irradiation fluences of 200 MeV Xe ions, the Mg K-edge and Al K-edge spectra were synchronouslychanged. The calculated spectra based on density function theory indicate that the change in experimental spectra weredue to cation disordering between Mg in tetrahedral sites and Al in octahedral sites. These results suggest a high inversiondegree to the extent that completely random configuration is achieved in MgAl2O4 induced by the high density electronicexcitation under swift heavy ion irradiation..
6. J-M. Costantini, S. Miro, G. Gutierrez, K. Yasuda, S. Takaki, N. Ishikawa, M. Toulemonde, "Raman spectroscopy study of damage induced in cerium dioxide by swift heavy ion Irradiations"
, Journal of Applied Physics, https://doi.org/10.1063/1.5011165, 122, 205901(9 pages), 2017.10, The damage induced in cerium dioxide by swift heavy ion irradiation was studied by micro-Raman
spectroscopy. For this purpose, polycrystalline sintered pellets were irradiated by 100-MeV Kr,
200-MeV Xe, 10-MeV, and 36-MeV W ions in a wide range of fluence and stopping power (up to
28MeV lm1). No amorphization of ceria was found whatsoever, as shown by the presence of
the peak of Raman-active T2g mode (centered at 467 cm1) of the cubic fluorite structure for all
irradiation conditions. However, a clear decrease of the T2g mode peak intensity was observed as a
function of ion fluence to an asymptotic relative value of about 45%. Similar decays were also
observed for satellite peaks and second-order peaks. Track radii deduced from the decay kinetics
for the 36-MeV W ion data are in good agreement with previous determinations by X-ray diffraction
and reproduced by the inelastic thermal spike model for low ion velocities. However, interaction
between the nuclear and electronic stopping powers is needed to describe the decay kinetics of
10-MeV W ion data by the thermal spike process. Moreover, the asymmetrical broadening of the
main T2g peak after irradiation was analyzed with different theoretical models. Published by AIP
Publishing. https://doi.org/10.1063/1.5011165.
7. J.-M. Costantini, Y. Watanabe, K. Yasuda, M. Fasoli, “Cathodo-luminescence of Color Centers Induced in Sapphire and Yttria-stabilized Zirconia by High Energy Electrons”, Journal of Applied Physics, http://dx.doi.org/10.1063/1.4980111, 121, 153101(10 pages), 2017.05.
8. K. Nogita, X.Q.Tran, T. Yamamoto, E. Tanaka, S.C. McDonald, C.M. Gourlay, K. Yasuda, S. Matsumura, "Reply to ‘Comments on "Evidence of the hydrogen release mechanism in bulk MgH2", Scientific Report, DOI: 10.1038/srep43720, 7, 43720 (3pages), 2017.04.
9. A. Rinkenburger, T. Toriyama, K. Yasuda, R. Niessner, The catalytic effect of potassium compounds in soot oxidation, ChemCatChem, ChemCatChem 10.1002/cctc.201700338, 2017.03.
10. Y. Matsukawa, S. Kitayama, K. Murakami, Y. Shinohara, K. Yoshida, H. Maeno, H.L. Yang, K. Toyama, K. Yasuda, H. Watanabe, A. Kimura, H. Muta, S. Yamanaka, Y.F.Li, Y. Sato, S. Kano, H. Abe, “Reassessment of oxidation-induced amorphization and dissolution of Nb precipitates in Zr_Nb nuclear fuel cladding tubes”, Acta Materialia, http://dx.doi.org/10.1016/j.actamat, 127, 153-164, 2017.01, Y. Matsukawa, S. Kitayama, K. Murakami, Y. Shinohara, K. Yoshida, H. Maeno, H.L. Yang, T. Toyama, K. Yasuda, H. Watanabe, A. Kimura, H. Muta, S. Yamanaka, Y.F. Li, Y. Satoh, S. Kano, H. Abe,.
11. T. Sueyoshi, Y. Iwanaga, Y. Fujiyoshi, Y. Takai, M. Mukaida, M. Kudo, K. Yasuda, N. Ishikawa, Angular Behavior of Jcin GdBCO Coated Conductors with Crossed Columnar Defects around ab-plane, IEEE Transactions of Applied Superconductivity, 2MPo2E, 01-05, 2017.01.
12. T. Sueyoshi, Y. Iwanaga, Y. Fujiyoshi, Y. Takai, M. Mukaida, M. Kudo, K. Yasuda, N. Ishikawa, Angular Behavior of Jcin GdBCO Coated Conductors with Crossed Columnar Defects around ab-plane”, IEEE Transactions of Applied Superconductivity, 2MPo2E, 01-05, 2017.01.
13. Mo-Rigen He, S. Wang, S.Shi, K. Jin, H. Bei, K. Yasuda, S. Matsumura, K. Higashida, I.M. Robertson, Mechanisms of Radiation-Induced Segregation in CrFeCoNi-based Single-Phase Concentrated Solid Solution Alloys, http://dx.doi.org/10.1016/j.actamat.2016.12.046, 126, 182-193, 2016.12,
.
14. Mo-Rigen He, S. Wang, K. Jin, H. Bei, K. Yasuda, S. Matsumura, Kenji Higashida, I.M. Robertson, Enhanced Damage Resistance and Novel Defect Structure of CrFeCoNi under In Situ Electron Irradiation, http://dx.doi.org/10.1016/, 125, 5-9, 2016.07.
15. K. Sato, S.Tashiro, Y. Yamaguchi, T.J. Konno, T. Yamamoto, K. Yasuda, S. Matsumura, Three-Dimensional Imaging of a Long-Period Stacking Ordered Phase in Mg97Zn1Gd2 Using High-Voltage Electron Microscopy, MATERIALS TRANSACTIONS , 57, 918, 2016.07.
16. AKM S.I. Bhuian, T. Yamamoto, K. Kuwahara, K. Yasuda, S. Matsumura, H. Yasuda, Temperature dependent evolution of dislocation loops in YSZ under high energy electron irradiation, Transaction of Materiaks Research Society of Japan 41 (2016) 319, 41 , 319-323, 2016.07.
17. S. Takaki, K. Yasuda, S. Yoshioka, S. Matsumura, N. Ishikawa, Structure of Ion Tracks in Ceria Irradiated with High Energy Xenon Ions, http://dx.doi.org/10.1016/j.pnucene.2016.07.013, 92, 306-312, 2016.06, .
18. J.-M. Costantini, L. Gerald, G. Maxime, W.J. Weber, S. Takaki, K. Yasuda, Color-center production and recovery in electron-irradiated magnesium aluminate spinel and ceria, Journal of Physics Condensed Matter, doi:10.1088/0953-8984/28/32/325901, 28, 325901(9pages), 2016.06.
19. K. Yasuda, Structure of defects and microstructure evolution in oxide ceramics -role of electronic excitation and selective displacement damage-, 2nd Int. Workshop Irradiation of Nuclear Materials: Flux and Dose Effects, 2016.01.
20. S. Yoshioka, T. Yamamoto, K. Yasuda, S. Matsumura, “X-ray absorption fine structure investigation of long period stacking ordered structure formation in Mg-Zn-Gd alloys”, PTM 2015-Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015,, 743-744, 2015.09.
21. A. Takano, K. Maehata, Naoko IYOMOTO, K. Yasuda, H. Maeno, K. Shiiyama, K. Tanaka, Characterization of Polycapillary Optics in a TES microcalorimeter EDS system installed on an SEM, J. of Low Temperature Physics, DOI 10.1007/s10909-015-1350-6 , 2015.06.
22. T. Sueyoshi, T. Kotaki, Y. Furuki, Y. Uraguchi, T.Kai, T.Fujiyoshi, Y. SHimada, kazuhiro Yasuda, N. Ishikawa, Influence of discontinuous columnar defects on flux pinning in GdBCO coated conductors, IEEE Transactions of Applied Superconductivity, 2015.04.
23. A. Takano, K. Maehata, N. IYOMOTO, K. Yasuda, H. Maeno, K. Shiiyama, K. Tanaka, “Characterization of TEM Microcalorimeter EDS System on a SEM”, Proceedings of the 29th Workshop on Radiation Detectors and Their Uses, Feburary 3-5, 2015. Tsukuba, Japan, pp. 28-37. , 2015.02.
24. Kazuhiro Nogita, X.Q.Tran, T. Yamamoto, E. Tanaka, S.C. McDonald, C.M. Gourlay, kazuhiro Yasuda, Syo Matsumura, Evidence of the hydrogen release mechanism in bulk MgH2, Scientific Report, 2015.02.
25. S. Takaki, kazuhiro Yasuda, T.Yamamoto, Syo Matsumura, N. Ishikawa, Atomic-Resolution HAADF/ABF-STEM Observation of Radiation-Induced Defects in Ceria, Proceedings on 18th Internbational Microscopy Congress, Prague, 2014.09.
26. N. Sumimoto, k. Nakao, T. Yamamoto, kazuhiro Yasuda, Syo Matsumura, In-situ observation of morphological changes of gold nanorods under near infrared pulsed laser irradiation, Proceedings on 18th Internbational Microscopy Congress, 2014.09.
27. N. Sumimoto, k. Nakao, T. Yamamoto, kazuhiro Yasuda, Syo Matsumura, Yasuro Niidome, In-situ observation of structural transformation of gold nanorods under pulsed laser irradiation in an HVEM, Microscopy , 2014.05.
28. K. Yasuda, T.Yamamoto, S. Takaki, S. Matsumura, N. Ishikawa, Atomic Structure of Ion Tracks and Microstructure Evolution in Oxides Irradiated with Swift Heavy Ions, Proceedings on Eleventh International Topical Meetings on Nuclear Applications of Accelerators (AccApp'13), 5 pages, 2013.08.
29. S. Takaki, kazuhiro Yasuda, T. Yamamoto, Syo Matsumura, N. Ishikawa, Atomic Structure of Ion Tracks In Ceria, Nucl. Instr. and Meth. Phys. Res.B, 326, 140-144, 2014.05.
30. S. Takaki, T. Yamamoto, M. Kutsuwada, kazuhiro Yasuda, Syo Matsumura, N. Ishikawa, M.Matsuda, M. Sataka, Atomic Structure of Ion Tracks in CeO2 Irradiated with 200 MeV Xe Ions, JAEA-review, JAEA-Tandem Annual Report , 2014.07.
31. kazuhiro Yasuda, Motoki Etoh, Kenichi Sawada, Tomokazu Yamamoto, Syo Matsumura, Kazufumi Yasunaga, Norito Ishikawa, Defect formation and accumulation in CeO2 irradiated with swift heavy ions, Nucl. Instr. and Meth. B, 314,(2013) pp. 185-190., 2013.06.
32. K. Furumoto, Tetsuo Tanabe, Naoji Yamamoto, Takeshi Daio, Syo Matsumura, kazuhiro Yasuda, Development of Novel Optical Fiber System for Cathodoluminescence Detection in High Voltage Transmission Electron Microscope, Materials Transactions, 54, 5, 854-856, 2013.05.
33. Seiya Takaki, Tomokazu Yamamoto, Masanori Kutsuwada, kazuhiro Yasuda, Syo Matsumura, Atomistic observation of electron irradiation-induced defects in CeO2
, Materials Research Symposium Proceedings , 1514, 2013.03.
34. K. Yasuda, T. Yamamoto, M. Etoh, S. Kawasoe, S. Matsumura, N. Ishikawa, Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation, International Journal of Materials Research , 102, 9, 1082-1088, 2011.09.
35. K. Shiiyama, T. Yamamoto, T. Takahashi, A. Guglielmetti, A. Chartier, K. Yasuda, S. Matsumura, K. Yasunaga, C. Meis, Molecular dynamics simulations of oxygen Frenkel pairs in cerium dioxide, Nucl. Instr. and Meth. Phys. Res., B, 268, pp.107-108, 2010.08.
36. K. Yasuda, K. Yasunaga, K. Shiiyama, S. Matsumura, Radiation-induced defect kinetics and selective displacement damage in fluorite structure oxides, Proc. of Tenth Japan-China Symposium 'Materials for Advanced Energy Systems and Fission &Fusion Engineering, 2010.11.
37. Y. Takahashi, M. Tanaka, K. Higashida, K. Yasuda, S. Matsumura, H. Noguchi, Acombined environmental straining specimen holder for high-voltage electron microscopy, Ultramicroscopy, 110, 1420-1427, 2010.09.
38. M. Shirai, K. Tsumori, K. Yasuda, S. Matsumura, N. Ishikawa, Morphological and compositional change in FePt nanogranular thin films irradiated with swift heavy ion irradiation, JAEA-Tokai Tandem Annual Report, pp.107-108., 2009.06.
39. M. Shirai , K. Tsumori, M. Kutsuwada, K. Yasuda, S. Matsumura, Morphological change in FePt nanogranular thin films induced by swift heavy ion irradiation, Nucl. Instr. and Meth. Phys. Res., B , 267, pp.1781-1791., 2009.05.
40. M. Kinoshita, K. Yasunaga, T. Sonoda, A. Iwase, N. Ishikawa, M. Sataka, K. Yasuda, S. Matsumura, H. Y. Geng, T. Ichinomiya, Y. Chen, Y. Kaneta, M. Iwasawa, T. Ohnuma, Y. Nishiura, J. Nakamura, Hj Matzke, Recovery and Restructuring induced by Fission Energy Ion in High Burnup Nuclear Fuel, Nucl. Instr. and Meth. Phys. Res., B , 267, pp.960-963., 2009.05.
41. K. Yasuda, T. Yamamoto, S. Kawasoe, M. Eto, S. Matsumura, N. Ishikawa, Atomic structure of ion tracks in magnesium aluminate spinel irradiated with swift heavy ions, JAEA Review, 2008, 101-102, 2008.12.
42. A. Chartier, T. Yamamoto, K. Yasuda, C. Meis, K. Shiiyama, and S. Matsumura, Molecular dynamics simulation of irradiation induced phase transition in MgAl2O4, Proceedings of the Fourth International Conference on Multiscale Materials Modeling (MMM2008), pp.583-588., 2008.11.
43. K Shiiyama, T. Yamamoto, T. Takahashi, A. Guglielmetti, A. Chartier, K. Yasuda, S. Matsumura, K. Yasunaga, C. Meis, Molecular Dynamics Study of Frenkel Pairs in Cerium Dioxide, Proceedings of the Fourth International Conference on Multiscale Materials Modeling (MMM2008), pp.598-601., 2008.11.
44. A. Guglielmetti, A. Chartier, L. Van Brutzel, J.-P. Croconbette, K. Yasuda, C. Meis, S. Matsumura, Atomistic simulation of point defects behavior in Ceria, Nucl. Instr. and Meth. Phys. Res., B, 266, pp.5120-5125., 2008.10.
45. A. Chartier, T. Yamamoto, K. Yasuda, C. Meis and S. Matsumura, Frenkel pair accumulation induced crystallization of amorphous MgAl2O4, J. Nucl. Mater, 378, pp.188-192, 2008.08.
46. T. Yamamoto, A. Chartier, K. Yasuda, C. Meis, K. Shiiyama and S. Matsumura, Molecular Dynamics Simulation of Point Defect Accumulation in MgAl2O4, Nucl. Instr. and Meth. Phys. Res., B, 266、pp.2676-2682, 2008.05.
47. K. Yasuda, T. Yamamoto, S. Seki, K. Shiiyama and S. Matsumura, Production and Stability of Radiation-Induced Defects in MgAl2O4 under Electronic Excitation, Nucl. Instr. and Meth. Phys. Res., B, 266、pp.2834-2841, 2008.05.
48. K. Yasunaga, K. Yasuda, S. Matsumura, T. Sonoda, Electron-energy dependent formation of dislocation loops in CeO2, Nucl. Instr. and Meth. Phys. Res., B, 266、pp.2877-2881, 2008.05.
49. K. Yasuda, K. Yasunaga, S. Matsumura, T.Sonoda, Characteristics of Radiation-Induced Defects in Fluorite Structure Oxides Formed by Electron Irradiation
(PPt file), Materials Innovations for Next-Generation Nuclear Energy, edited by R. Devanathan, R.W. Grimes, K. Yasuda, B.P. Uberuaga, and C. Meis (Mater. Res. Soc. Symp. Proc. Volume 1043E, Warrendale, PA, 2007) , 1043-T12-02, 2007.12.
50. K. Yasuda, T. Yamamoto, S. Kawasoe, S. Matsumura and N. Ishikawa, Microstructure and Ion Configuration of Spinel Irradiated with Swift Heavy Ions, JAEA Review, 2007-046 (2007) 91., 2007.10.
51. Kazuhiro Yasuda, Tomokazu Yamamoto and Syo Matsumura, The Atomic Structure of Disordered Ion Tracks in Magnesium Aluminate Spinel, Journal of Materials, (2007) 27, 2007.04.
52. 安田和弘、山本知一、島田幹夫、松村晶, スピネル化合物中のイオントラックの構造と不規則化挙動, 顕微鏡, 41(2006)150., 2007.02.
53. K. Yasunaga, K. Yasuda, S. Matsumura and T. Sonoda, Nucleation and growth of defect clusters in CeO2 irradiated with electrons, Nucl. Instr. and Meth. Phys. Res., B, 250 (2006) 114, 2006.12.
54. K. Yasuda, T. Yamamoto, M. Shimada, S. Matsumura, Y. Chimi and N. Ishikawa, ‘, Atotic structure and disordering induced by 350 MeV Au ions in MgAl2O4, Nucl. Instr. and Meth. Phys. Res., B, 250 (2006) 238, 2006.12.
55. T. Yamamoto, M. Shimada, K. Yasuda, S. Matsumura, Y. Chimi and N. Ishikawa, Microstructure and atomic disordering of magnesium aluminate spinel irradiated with swift heavy ions, Nucl. Instr. and Meth. Phys. Res., B, 245 (2006) 235, 2006.12.
56. Kazuhiro Yasuda and Syo Matsumura, Radiation Damage Effects in Insulators for Fusion Reactors: Microstructure Evolution in MgO-Al2O3 System Oxide Crystals, Advances in Science and Technologies , 45 (2006) 1951, 2006.10.
57. Masatoshi Watanabe, Takashi Noma, Kazuhiro Yasuda, Kazufumi Yasunaga, Syo Matsumura and Chiken Kinoshita,, In-situ Transmission Electron Microscopy Observation of Electron-beam-induced
Defect-clusters in CaF2 Crystal, Proc. of 16th Electron Mmicroscopy Congress, 1854, 2006.08.
58. Kazuhiro Yasuda , Tomokazu Yamamoto, Mikio Shimada and Syo Matsumura , HRTEM Study of Radiation-induced Ion Tracks in MgAl2O4 Spinel, Proc. of 16th Electron Mmicroscopy Congress, 1853, 2006.08.
59. Tomokazu Yamamoto, Mikio Shimada, Kazuhiro Yasuda, Syo Matsumura, Yasuhiro Chimi and Norito Ishikawa,, Electron Channeling X-ray Analysis of Cation Disordering in MgAl 2 O4 Spinel
Irradiated with 350 MeV Au Ions, Proc. of 16th Electron Mmicroscopy Congress, 896, 2006.08.
60. Manabu Shirai, Atsushi Horiguchi, Kazuhiro Yasuda, Syo Matsumura, Masato Watanabe and Takeshi Masumoto, , Electron Tomography Observation for Morphological Change of FePt Particles
Induced by Ion Irradiation, Proc. of 16th Electron Mmicroscopy Congress, 704, 2006.08.