学術論文

1. Study of local atomic structures of Sm doped YbB6 observed by X-ray fluorescence holography
Yodai Kobayashi, Kenji Ohoyama, Shoichi Uechi, Koji Kimura, Naohisa Happo, Fumitoshi Iga, and Koichi Hayashi
e-J Surf Sci Nanotechnol. In press


2. Development of instruments for imaging of local magnetic structure by magnetic neutron holography
Tomoya Kanno, Kenji Ohoyama, Hajime Nakada, Yuto Fukui, Kota Yamakawa, Shota Hoshi, Motoki Takano, Yodai Kobayashi, Yuka Tomimatsu, Shingo Takahashi, Takayuki Oku, Takuya Okudaira, Ryuju Kobayashi, Shusuke Takada, Masahide Harada, Kenichi Oikawa, Yasuhiro Inamura, Toetsu Shishido, Keisuke Sato, Koichi Hayashi
Nucl. Instrum. Mthods Phys Res. Sec A 1064, 169349(1)-(9) (2024).


3. Atomic imaging of BaTiO3 by multiple-wavelength neutron holography
Kota Yamakawa, Hajime Nakada, Koji Kimura, Kenichi Oikawa, Masahide Harada, Yasuhiro Inamura, Kenji Ohoyama, Koichi Hayashi
J. Phys. Soc. Jpn. J. Phys. Soc. Jpn. 93, 104601(1)-(5) (2024).


4. Determination of site occupancy of boron in 6H-SiC by multiple-wavelength neutron holography
K. Hayashi, M. Lederer, Y. Fukumoto, M. Goto, Y. Yamamoto, N. Happo, M. Harada, Y. Inamura, K. Oikawa, K. Ohoyama, and P. Wellmann
Appl. Phys. Lett. 120, 132101 (2022).


5. Chemical-Pressure-Induced Point Defects Enable Low Thermal Conductivity for Mg2Sn and Mg2Si Single Crystals
Wataru Saito, Kei Hayashi, Zhicheng Huang, Kazuya Sugimoto, Kenji Ohoyama, Naohisa Happo, Masahide Harada, Kenichi Oikawa, Yasuhiro Inamura, Kouichi Hayashi, Takamichi Miyazaki, Yuzuru Miyazaki
ACS Applied Energy Materials 5, (2021) 5123-5131

DOI: 10.1021/acsaem.1c00670


6. Behavior of Sm in the boron-cage of Sm-doped RB6 (R=Yb,La) observed　by multiple-wavelength neutron holography
S. Uechi, K. Ohoyama,Y. Fukumoto, Y. Kanazawa, N. Happo, M. Harada, Y. Inamura, K. Oikawa, W. Matsuhra, F. Iga, A. K. R. Ang, and K. Hayashi
Phys. Rev. B 102, (2020)054104(1)-(10).
DOI:https://doi.org/10.1103/PhysRevB.102.054104


7. Preparation, thermoelectric properties, and crystal structure of boron-doped Mg2Si single crystals
Kei Hayashi, Wataru Saito, Kazuya Sugimoto, Kenji Ohoyama, Kouichi Hayashi, Naohisa Happo, Masahide Harada, Kenichi Oikawa, Yasuhiro Inamura, and Yuzuru Miyazaki
AIP Advances 10, (2020) 035115(1)-(7).
DOI: https://doi.org/10.1063/1.5143839


8. Tetragonality induced superconductivity in anti-ThCr₂Si₂-type RE₂O₂Bi (RE = rare earth) with Bi square net
Ryosuke Sei, Hideyuki Kawasoko, Kota Matsumoto, Masato Arimitsu, Kyohei Terakado, Daichi Oka, Shintaro Fukuda, Noriaki Kimura, Hidetaka Kasai, Eiji Nishibori, Kenji Ohoyama, Akinori Hoshikawa, Toru Ishigaki, Tetsuya Hasegawa and Tomoteru Fukumura
Dalton Transactions, 49 (2020) 3321-3325.
DOI: https://doi.org/10.1039/C9DT04640B


9. Investigation of magnetism and magnetic structure of anti-ThCr₂Si₂-type Tb₂O₂Bi by magnetization and neutron diffraction measurements
Hideyuki Kawasoko1, Kenji Ohoyama2, Ryosuke Sei1,3, Kota Matsumoto1, Daichi Oka1, Akinori Hoshikawa4, Toru Ishigaki4, and Tomoteru Fukumura1,5
AIP Advances 9, 115301(1)-(4) (2019)
DOI: 10.1063/1.5126399


10. A case of multifunctional intermetallic compound: negative thermal expansion coupling with magnetocaloric effect in (Gd,Ho)(Co,Fe)2
Jinyu Hu,1 Kun Lin,1,* Yili Cao,1 Rongjin Huang,2 Takeshi Matsukawa,3 Toru Ishigaki,3 Henry E. Fischer,4 Kenichi Kato,5 Takashi Honda,6 Kazutaka Ikeda,6 Toshiya Otomo,6 Kenji Ohoyama,7 Jinxia Deng,1 Jun Chen,1 Xianran Xing
Inorg. Chem. Front., 6　(2019) 3146-3151.
DOI: 10.1039/C9QI00880B


11. White neutron holography in pulsed neutron facilities (Invited Review Paper)
Kenji Ohoyama, Kouichi Hayashi
Phys. Status Solidi B 255(2018) 1800143(1)-(9).
DOI: https://doi.org/10.1002/pssb.201800143


12. Neutron Diffraction Studies on Valence Ordering Compound YbPd
K. Oyama, M. Sugishima, K. Tanabe, A. Mitsuda, H. Wada, K. Ohoyama, T. Matsukawa, Y. Yoshida, A. Hoshikawa, T. Ishigaki, and K. Iwasa
J. Phys. Soc. Jpn. 87 (2018)114705(1)-(6). DOI: 10.7566/JPSJ.87.114705


13. Effects of Fe doping on anomalous specific heat and XAFS oscillation in antiferromagnetic metal Mn3Si
H. Hiraka, K. Ohoyama, M. Kosaka, D. Matsumura
AIP Advances 8, (2018)101424(1)-(5).
doi.org/10.1063/1.5042639


14. Principle and Reconstruction Algorithm for Atomic-Resolution Holography
Tomohiro Matsushita, Takayuki Muro, Fumihiko Matsui,Naohisa Happo, Shinya Hosokawa, Kenji Ohoyama,Ayana Sato-Tomita, Yuji C. Sasaki, and Kouichi Hayashi
J. Phys. Soc. Jpn. 87 (2018) 061002(1)-(11).
DOI:10.7566/JPSJ.87.061002


15. Ready to Roll? Time to Launch POLANO
Tetsuya Yokoo, Shinichi Itoh, Naokatsu Kaneko, Masaki Fujita, Takashi Ino, Manabu Ohkawara, Kenji Ohoyama,　and Masataka Sakaguchi
AIP Conference Proceedings 1969 (2018)050001(1)-(6).
/ doi/abs/10.7566/JPSJ.87.061002


16. Multiple-wavelength neutron holography with pulsed neutrons
Kouichi Hayashi, Kenji Ohoyama, Naohisa Happo, Tomohiro Matsushita, Shinya Hosokawa, Masahide Harada, Yasuhiro Inamura, Hiroaki Nitani, Toetsu Shishido, Kunio Yubuta
Science Advances, 3 (2017) e1700294.(DOI:10.1126/sciadv.1700294.


17. Crystal structures, magnetic properties, and DFT calculation of B-site defected 12L-perovskites Ba2La2MW2O12 (M = Mn, Co, Ni, Zn).
Yoshihiro Doi, Makoto Wakeshima, Keitaro Tezuka, Yue Jin Shan, Kenji Ohoyama, Sanghyun Lee, Shuki Torii, Takashi Kamiyama and Yukio Hinatsu
J. Phys.: Condens. Matter 29 (2017) 365802 (11pp)/ DOI: 10.1088/1361-648X/aa7c9b


18. Local structure of room-temperature superionic Ag-GeSe3 glasses
J. Stellhorn, S. Hosokawa, Y. Kawakita, D. Gies, W.-C. Pilgrim, K. Hayashi, K. Ohoyama, N. Blanc, N. Boudet
J. Non-Crystalline Solids 431 (2016) 68-71.


19. Neutron holography and diffuse scattering of palladium hydride
K. Hayashi, K. Ohoyama, S. Orimo, H. Takahashi, and K. Shibata
Phys. Rev. B 91 (2015) 024102(1)-(7).


20. Development and demonstration of in-situ SEOP 3He spin filter system for neutron spin analyzer on the SHARAKU polarized neutron reflectometer at J-PARC
H. Hayashida, T. Oku, H. Kira, K. Sakai, M. Takeda, Y. Sakaguchi, T. Ino, T. Shinohara, K. Ohoyama, J. Suzuki, K. Kakurai, M. Mizusawa, N. Miyata, D. Yamazaki, R. Maruyama, K. Soyama, M. Arai
Journal of Physics: Conference Series, Vol. 528, (2014) 012020(1)-(7).


21. Novel Magnetic Chiral Structures and Unusual Temperature Hysteresis in the Metallic Helimagnet MnP
T. Yamazaki, Y. Tabata, T. Waki, T. J Sato, M. Matsuura, K. Ohoyama, M. Yokoyama, H. Nakamura
J. Phys. Soc. Jpn 83(2014) 054711(1)-(8).


22. Diffusion Path and Conduction Mechanism of Protons in Hydroxyapatite
M. Yashima, N. Kubo, K. Omoto, H. Fujimori, K. Fujii, K. Ohoyama
J. Phys. Chem. C 118 (2014) 5180-5187.


23. Polarized-neutron-diffraction study of the microscopic magnetic structure in α''−Fe16N2 nanoparticles
H. Hiraka, K. Ohoyama, Y. Ogata, T. Ogawa, R. Gallage, N. Kobayashi, M. Takahashi, B. Gillon, A. Gukasov, and K. Yamada
Phys. Rev. B 90 (2014) 134427(1)-(5).


24. Construction of Polarized Inelastic Neutron Spectrometer in J-PARC
T. Yokoo, K. Ohoyama , S. Itoh, J. Suzuki, K. Iwasa,T. J. Sato, H. Kira,Y. Sakaguchi , T. Ino,T. Oku, K.Tomiyasu, M. Matsuura, H. Hiraka, M. Fujita, H. Kimura, T. Sato, J. Suzuki ,M. Takeda, K. Kaneko, M. Hino, S. Muto
J. Phys.: Conf. Ser. 502 (2014) 012046-1-5.


25. Concepts of Neutron Polarisation Analysis Devices for a New Neutron Chopper Spectrometer, POLANO, in J-PARC
K. Ohoyama, T. Yokoo, S. Itoh, T. Ino, M. Ohkawara, T. Oku, S. Tasaki, K. Iwasa, T. J. Sato, S Ishimoto, K. Taketani, H. Kira, Y. Sakaguch, M. Nanbu, H Hiraka, H. M. Shimizu, M. Takeda, M. Hino, K. Hayashi, U. Fliges and P. Hautle
J. Phys.: Conf. Ser. 502 (2014) 012051-1-4.


26. Physical Properties of Double Perovskite-type Barium Neodymium Osmate Ba2NdOsO6.
M. Wakeshima, Y. Hinatsu, and K. Ohoyama
J.Solid State Chem. 197 (2013) 236-241.


27. Newly Proposed Inelastic Neutron Spectrometer POLANO
T. Yokoo, K.Ohoyama , S. Itoh, J. Suzuki, K. Iwasa,T. J. Sato, H. Kira,Y. Sakaguchi , T. Ino,T. Oku, K.Tomiyasu, M. Matsuura, H. Hiraka, M. Fujita, H. Kimura, T. Sato, J. Suzuki ,M. Takeda, K. Kaneko, M. Hino, S. Muto
J. Phys. Soc. Jpn.82 (2013) SA035(1)-(5).


28. Basic Concepts of Polarisation Analysis of Neutron Chopper Spectrometer, POLANO, at J-PARC
K. Ohoyama, T. Yokoo, S. Itoh, J. Suzuki, K. Iwasa, T.J. Sato, H. Kira, Y. Sakaguchi, T. Ino,T. Oku, K. Tomiyasu, M. Matsuura, H. Hiraka, M. Fujita, H. Kimura, T. Sato, J. Suzuki, H.M.Shimizu, T. Arima, M. Takeda, K. Kaneko, M. Hino, S. Muto, H. Nojiri, C.H. Lee, J.G. Park, S. Choi
J. Phys. Soc. Jpn. 82 (2013) SA036(1)-(6)


29. Development of a non-adiabatic two-coil spin flipper for a polarised thermal neutron diffractometer with a 3He spin filter
K. Ohoyama, K. Tsutsumi,T. Ino,H. Hiraka,Y. Yamaguchi, H. Kira,T. Oku,Y. Sakaguchi, Y. Arimoto,W. Zhang, H. Kimura, K. Iwasa,M. Takeda, J. Suzuki, K. Yamada, K. Kakurai
Nucl. Instrum. Meth. Phys. Res. A 680 (2012) 75-81.


30. Magnetic and Neutron Diffraction Study on Melilite-Type Oxides Sr2MGe2O7 (M = Mn, Co)
T. Endo, Y. Doi, Y. Hinatsu, and K. Ohoyama
Inorg. Chem. 51 (2012) 3572−3578.


31. Modified cross-correlation for efficient white-beam inelastic neutron scattering spectroscopy
K. Tomiyasu, M. Matsuura, H. Kimura, K. Iwasa, K. Ohoyama, T. Yokoo,S. Ioth, E. Kudoh,T. Sato,M. Fujita
Nucl. Instrum. Meth. Phys. Res. A 677 (2012) 89-93


32. Sr1-xBaxFeO2 (0.4 < x < 1): A New Oxygen-Deficient Perovskite Structure.
Yamamoto T, Kobayashi Y, Hayashi N, Tassel C, Saito T, Yamanaka S, Takano M, Ohoyama K, Shimakawa Y, Yoshimura K, Kageyama H.
J Am Chem Soc. 134 (2012) 11444-11454.


33. Emergence of Magnetic Long-range Order in Frustrated Pyrochlore Nd2Ir2O7 with Metal-Insulator Transition
Tomiyasu, K, Matsuhira, K, Iwasa, K , Watahiki, M, Takagi, S ,Wakeshima, M , Hinatsu, Y, Yokoyama, M , Ohoyama, K ,; Yamada, K,
J. Phys Soc. Jpn. 81 (2012) 034709(1)-(6).

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