Updated on 2022/02/21

写真a

 
KATO Hiroaki
 
Title
Professor(Moving Out or Retirement)

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

  • Nanotechnology/Materials / Applied physical properties

  • Nanotechnology/Materials / Nanomaterials

  • Nanotechnology/Materials / Nanometer-scale chemistry

Graduating School

  • Hokkaido University, Faculty of Science

    1979.03, Graduated

Graduate School

  • Tohoku University, Graduate School, Division of Natural Science

    Doctor's Course, 1984.06, Accomplished credits for doctoral program

Degree

  • Doctor of Science, Tohoku University, 1985.01

External Career

  • , Research Assistant, 1985.03 - 1994.03

  • , Associate Professor (as old post name), 1994.04 - 2006.08

 

Papers

  • Rare-earth moment reduction and local magnetic anisotropy in Pr2Fe14B and Tm2Fe14B, Journal of Magnetism and Magnetic Materials, 545 168684, 2022.03

    H. Sato, T. Yoshioka, H. Tsuchiura, et al.

    Multiple Authorship (Only Japanese)

  • Reduction of Nd moments and local magnetic anisotropy in Nd2Fe14B single crystals, AIP Advances, 11 024224, 2021.02

    H. Sato, Y. Kubo, T. Yoshioka, H. Tsuchiura, Y. Mizuno, K. Koike, K. Takahashi, H. Kato

    Multiple Authorship (Only Japanese)

  • Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films, AIP Advances, 11 015134, 2021.01

    K. Koike, K. Ohashi, H. Kato, et al.

    Multiple Authorship (Only Japanese)

  • Microstructure and coercivity in La-coated Nd2Fe14B thin films, AIP Advances, 7 035301, 2017.03

    M. Itakura, J. Fukuda, K. Koike, H. Ishikawa, D. Ogawa, and H. Kato

    Multiple Authorship (Including Foreigners)

  • Fabrication of orientation-controlled nanocomposite Nd2Fe14B/Mo/α–Fe multilayer films, IOP Conf. Series: Journal of Physics: Conf. Series, 903 012015, 2017

    K. Kobayashi, D. Ogawa, K. Koike, H. Kato, M. Oogane, T. Miyazaki, Y. Ando, M. Itakura

    Multiple Authorship (Including Foreigners)

  • Thermal stability of Sm2Fe17N3 magnet powders, IOP Conf. Series: Journal of Physics: Conf. Series, 903 012042, 2017

    N. Imaoka, K. Takagi, K. Ozaki, T. Iriyama, H. Kato

    Multiple Authorship (Including Foreigners)

  • Interface modification and magnetic properties of Nd2Fe14B prepared by thin film process, Magnetics Japan, 11(6) 333-343, 2016.12

    K. Koike, D. Ogawa, H. Kato

    Multiple Authorship (Only Japanese)

  • Large difference between the magnetic properties of Ba and Ti co-doped BiFeO3 bulk materials and their corresponding nanoparticles prepared by ultrasonication, Jouranal of Physics D: Applied Physics, 49 265003, 2016.03

    Bashir Ahmmad, Kensaku Kanomata, Kunihiro Koike,Shigeru Kubota, Hiroaki Kato, Fumihiko Hirose, Areef Billah, M A Jalil, M A Basith

    Multiple Authorship (Including Foreigners)

  • Modification of the interface nanostructure and magnetic properties in Nd-Fe-B thin films, Nanoscale Research Letters, 11(33) 1-8, 2016

    K. Koike, T. Kusano, D. Ogawa, K. Kobayashi, H. Kato, M. Oogane, T. Miyazaki, Y. Ando, M. Itakura

    Multiple Authorship (Including Foreigners)

  • Negative exchange coupling in Nd2Fe14B(100)/α-Fe interface, Applied Physics Letters, 107 102406, 2015.09

    D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando, and H. Kato

    Multiple Authorship (Including Foreigners)

  • Coercivity enhancement in La coated Nd-Fe-B thin films, Physics Procedia, 75 1294-1299, 2015

    K. Koike, H. Ishikawa, D. Ogawa, H. Kato, T. Miyazaki, Y. Ando, and M. Itakura

    Multiple Authorship (Including Foreigners)

  • Effect of Dy/Nd double layer on coercivity in Nd-Fe-B thin films, JOURNAL OF APPLIED PHYSICS, 115 17A735-17A737, 2014

    K. Koike, J. Umezawa, H. Ishikawa, D. Ogawa, T. Miyazaki, H. Kato and Y. Ando

    Multiple Authorship (Including Foreigners)

  • Evaluation of interlayer exchange coupling in α-Fe(100)/Nd2Fe14B(001) Films, J. Korean Phys. Soc., 63(3) 489-492, 2013.08

    2. D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando, H. Kato

    Multiple Authorship (Including Foreigners)

  • Interface state and Coercivity in Nd-Fe-B/Dy Films, J. Korean Phys. Soc., 63(3) 616-619, 2013.08

    3. J. Umezawa, Y. Sakai, K. Koike, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando, H. Kato

    Multiple Authorship (Including Foreigners)

  • Microwave surface resistance of YBCO superconducting thin films under high DC magnetic field, Physica C, 484 46-48, 2013.01

    1. T. Honma, S. Sato, K. Sato, M. Watanabe, A. Saito, K. Koike, H. Kato, S. Ohshima

    Multiple Authorship (Including Foreigners)

  • Small-Angle Neutron Scattering Measurements of the Averaged Internal Structures in Neodymium-Iron-Boron (Nd-Fe-B) Sintered Magnets, 76(3) 165-176, 2012.03

    Multiple Authorship (Only Japanese)

  • Effects of Annealing on the Coercivity in Sintered Nd-Fe-B Magnets, 76(1) 36-42, 2012.01

    Multiple Authorship (Only Japanese)

  • High-Magnetic-Field Annealing and Coercivity in Sintered Nd-Fe-B Magnets, 76(1) 72-80, 2012.01

    Multiple Authorship (Only Japanese)

  • Crystallization of Nd-Co-B Nanocomposite Ribbons in High Magnetic Fields, Journal of Applied Physics, 109 07A736, 2011.04

    Hiroaki Kato, Keiichi Koyama, Kohki Takahashi

    Multiple Authorship (Including Foreigners)

  • Low-Temperature Annealing Patterns and Demagnetization Curves in Sintered Nd-Fe-B Magnets, 34(3) 242-247, 2010.04

    Single Author

  • Effect of rare-earth overlayer on the coercivity in sputter-deposited Nd-Fe-B films, Journal of Physics: Conference Series, 200(8) 082015, 2010.02

    K. Koike, S. Igarashi, K. Yamaguchi, T. Kusano, T. Miyazaki, D. Ogawa, T. Akiya, Y. Adachi, H. Kato

    Multiple Authorship (Including Foreigners)

  • The role of Cu addition in the coercivity enhancement of sintered Nd-Fe-B permanent magnets, J. Mater. Res, 24 413-420, 2009.02

    W.F. Li, T. Ohkubo, T. Akiya, H. Kato, K. Hono

    Multiple Authorship (Including Foreigners)

  • Enhancement of coercivity in Al and Cu added Nd-Fe-B sintered magnets by high field annealing, IOP Conf. Series: Materials Science and Engineering, 1 012034, 2009.02

    Takahiro Akiya, Hiroaki Kato, Masato Sagawa and Keiichi Koyama

    Multiple Authorship (Including Foreigners)

  • Coercivity enhancement induced by high-magnetic-field annealing in sintered Nd-Fe-B magnets, Proceedings of 20th International Workshop on Rare Earth Permanent Magnet and Their Applications, Edited by D. Niarchos, 111-113, 2008.09

    Hiroaki Kato, Takahiro Akiya, Kunihiro Koike, Keiichi Koyama, and Masato Sagawa

    Multiple Authorship (Including Foreigners)

  • Effects of Fe and Co addition on the magnetoresistance of Ni-Mn-Ga films, Eur. Phys. J. Special Topics, 158 143-148, 2008.04

    K. Koike, M. Ohtsuka, M. Matsumoto, Y. Adachi, T. Takagi, and H. Kato

    Multiple Authorship (Including Foreigners)

  • Damping constant of Co/Pt multilayer thin-film media, Journal of Magnetism and Magnetic Materials, 320 3019-3022, 2008.04

    N. Fujita, N. Inaba, F. Kirino, S. Igarashi, K. Koike, H. Kato

    Multiple Authorship (Including Foreigners)

  • Electrical Resistivity of the Evaporeted Aluminum Thin Films Coated by Alkyl Derivative of Merocyanine Dye, Material Technology, 25(4) 194-198, 2007.09

    Masruroh, K. Orihara, K. Koike, H. Kato, M. Ishikawa, T. Kuroda, S. Ikeda, M. Toda

    Multiple Authorship (Including Foreigners)

  • Effect of high magnetic field on the coercivity in sintered Nd-Fe-B magnets, J.Magn. Magn. Mater., 310 2596-2598, 2007.03

    H. Kato, T. Akiya,M. Sagawa, K. Koyama, T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Effect of Nd-rich phase on c-axis orientation of Nd–Fe–B melt-spun magnet and its domain structure, J. Magn. Magn. Mater., 310 2572-2574, 2007.03

    M. Takezawa, K. Aiba, H. Yasuda, Y. Morimoto, T. Hidaka, J. Yamasaki, H. Kato, M. Yagi

    Multiple Authorship (Including Foreigners)

  • High magnetic-field annealing and coercivity in sintered Nd-Dy-Fe-B type magnets, J. Magn. Soc. Jpn., 30 447-454, 2006.07

    T. Akiya, H. Kato, M. Sagawa, K. Koyama, T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Giant tunneling magnetoresistance in Co2MnSi/Al–O/Co2MnSi magnetic tunnel junctions, APPLIED PHYSICS LETTERS, 88(19) 192508, 2006.05

    Y. Sakuraba, M. Hattori, M. Oogane, Y. Ando, H. Kato, A. Sakuma, T. Miyazaki, H. Kubota

    Multiple Authorship (Including Foreigners)

  • Fabrication of SmFe12 /α-Fe thin films as anisotropic nanocomposite magnet, J. Alloys Comp., 408-412 1368-1372, 2006.02

    H. Kato, H. Kubota, K. Koyama and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Fabrication and characterization of Co-Mn-Al Heusler-type thin film, J. Appl. Phys., 97(10) 10C913-10C913-3, 2005.05

    H. Kubota, J. Nakata, M. Oogane, Y. Ando, H. Kato, A. Sakuma, T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Realization of anisotropic nanocomposite magnet in Nd2Fe14B/α-Fe thin films, J. Magn. Magn. Mater., 2005.04

    H. Kato, M. Ishizone, K. Koyama and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Coercivity enhancements induced by high-field annealing in sintered Nd-Fe-B magnets, Proc. 18th Workshop on High Perfomance Magnets & Their Applications, edited by N.M. Dempsey and P. de Rango, 2004.05

    H. Kato, T. Miyazaki, M. Sagawa, K. Koyama

    Multiple Authorship (Including Foreigners)

  • Structure and magnetism in nanocrystalline Ca(La)B6 films, J. Magn. Magn. Mater., 2004.05

    Y. Sakuraba, H. Kato, F. Sato, T. Miyazaki, N. Kimura and H. Aoki

    Multiple Authorship (Including Foreigners)

  • Crystal-field-induced magnetostrictions in the spin reorientation process of Nd2Fe14B-type compounds, J. Magn. Magn. Mater., 2004.05

    H. Kato, M. Yamada and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Coercivity enhancements by high-magnetic-field annealing in sintered Nd2Fe14B magnets, Applied Physics Letters, 310 2596-2598, 2004.05

    H. Kato, M. Sagawa, K. Koyama and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Anisotropic lattice expansion and magnetism in sputter-deposited Ca(La)B6 films, PHYSICAL REVIEW B, 30 447-454, 2004.04

    Y. Sakuraba, H. Kato, F. Sato and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Magnetoresistance in Ce3Fe29-xTx (T=V and Cr), Journal of Magnetism and Magnetic Materials, 2002.01

    X.F. Han, Z.G. Sun, H. Kato, M. Oogane, B.G. Shen, F.M. Yang, and J.M.D. Coey

    Multiple Authorship (Including Foreigners)

  • High-Frequency Ferromagnetic Resonance in Nd2Fe14B/α-Fe Nanocomposite Films, IEEE Trans. Magn., 2001.07

    H. Kato, M. Ishizone, T. Miyazaki, K. Koyama, H. Nojiri, and M. Motokawa

    Multiple Authorship (Including Foreigners)

  • Successive Spin Reorientation and Magnetostriction in (Er1-xTbx)2Fe14B, IEEE Trans. Magn., 2001.07

    Hiroaki Kato, Tatsuya Ishizaki and Terunobu Miyazaki

    Multiple Authorship (Including Foreigners)

  • Magnetic Properties of c-axis Oriented SmFe12 /α-Fe Nanocomposite Films, Journal of Applied Physics, 2000.05

    H. Kato, T. Nomura, M. Ishizone, H. Kubota and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Effect of Particle Size on the Magnetization Process in Lithographic Arrays of Nd2Fe14B, Journal of Applied Physics, 2000.05

    H. Kubota, T. Ikari, Y. Ando, H. Kato, and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Fabrication and magnetic properties of exchange-coupled Nd-Fe-B/Fe nanocomposite thin films, J. Magn. Soc. Japan, 1999.01

    M. Ishizone, H. Kato, T. Miyazaki, M. Shindo and A. Sakuma

    Multiple Authorship (Including Foreigners)

  • Spin-reorientation and magnetostriction in highly oriented (Er1-xTbx)2Fe14B, J. Magn. Soc. Japan, 1999.01

    H. Kato, T. Ishizaki, F. Sato and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Magnetic properties of random-anisotropy amorphous magnets (RxFe1-x)80Si12B8 with R = Pr, Nd, Sm, Tb, Dy and Er, J. Magn. Magn. Mater., 1998.11

    H. Kato, N. Kurita, Y. Ando, T. Miyazaki and M. Motokawa

    Multiple Authorship (Including Foreigners)

  • Magnetic and transport properties of nonequilibrium Eu-Fe thin films, J. Phys. Condens. Matter, 1998.01

    T J Konno, N Ogawa, K Wakoh, K Sumiyama, K Shoji, H Onodera,H Kato and K Suzuki

    Multiple Authorship (Including Foreigners)

  • Magnetic Properties of (Fe1-xMnx)3Ga, J. Magn. Magn. Mater., 1998.01

    T. Hori, H. Niida, K. Ohyama, M. Ohashi, H. Onodera, Y. Yamaguchi,H. Kato, Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Magnetic Properties of (Ni1-xMnx)1.9Ge Alloys, J. Magn. Magn. Mater., 1998.01

    H. Shiraishi, T. Hori, H. Kato, H. Onodera, Y. Yamaguchi, K. Kanematsu

    Multiple Authorship (Including Foreigners)

  • Magnetic equation of state in a 2-dimentional Heisenberg ferromagnets, K2CuF4, in the intermediate region, J. Phys. Soc. Jpn., 1998.01

    K. Shiratori, Y. Nakagawa, H. Kato and M. Motokawa

    Multiple Authorship (Including Foreigners)

  • X-ray diffraction study of Sm2(Fe1-xAlx)17 single crystals with x = 0.058, 0.081, J. Magn. Magn. Mater., 1998.01

    Y. Ono, J. Shiomi, H. Kato, T. Iriyama, T. Kajitani

    Multiple Authorship (Including Foreigners)

  • Magnetic properties of exchange-coupled α-Fe/Nd-Fe-B multilayer thin-film magnets, J. Appl. Phys., 1997.04

    M. Shindo, M. Ishizone, A. Sakuma, H. Kato, and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Magnetic and transport properties of non-equilibrium BCC Eu-Fe alloys, Physica, 1997.01

    N. Ogawa, K. Sumiyama, T. J. Konno, H. Kato, K. Wakoh and K. Suzuki

    Multiple Authorship (Including Foreigners)

  • Magnetization process of the mixed compound with exchange frustrations Fe0.65Mn0.35TiO3 and Fe0.50Mn0.50TiO3 - Anomalous dependence on the sweep-rate of the magnetic fields, J. Phys. Soc. Jpn., 1997.01

    A. Ito, C. Oyama, A. Fukaya, H. Kato and S. Miura

    Multiple Authorship (Including Foreigners)

  • Exchange-spring behavior in sputter-deposited α-Fe/Nd-Fe-B multilayer magnets, J. Magn. Magn. Mater., 408-412 1368-1372, 1996.08

    M. Shindo, M. Ishizone, H. Kato, T. Miyazaki and A. Sakuma

    Multiple Authorship (Including Foreigners)

  • High field magnetization and spin reorientation in Sm2(Fe1-xAlx)17 and Nd2(Fe1-xAlx)17 single crystals, Sci. Rep. RITU, 1996.01

    H. Kato, T. Koide, M. Yamada, M. Motokawa and T. Miyazaki

    Multiple Authorship (Including Foreigners)

  • Anomalous sweep-rate dependence of the magnetization process of the mixed compound FexMn1-xTiO3 with exchange frustrations, Sci. Rep. RITU, 1996.01

    A. Ito, A. Fukaya, K. Fujii and H. Kato

    Multiple Authorship (Including Foreigners)

  • Neutron diffraction study on Y2Fe17 and Y2Fe17Nx (x = 2.1-2.6), Physica B, 1995.08

    T. Kajitani, Y. Morii, T. Iriyama and H. Kato

    Multiple Authorship (Including Foreigners)

  • Magnetic Excitations in Diluted Ising Antiferromagnet Fe1-xMgxTiO3, Physica B, 1995.08

    H. Kato, H. Kawano, H. Yoshizawa, Y. Yamaguchi and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Field-Induced Phase Transitions in Ferrimagnetic R2Fe14B in Ultra-High Magnetic Fields, Physica B, 1995.05

    H. Kato, D. W. Lim, M. Yamada, Y. Nakagawa, H. Aruga Katori, and T. Goto

    Multiple Authorship (Including Foreigners)

  • High Field Magnetization and Spin Reorientation in Sm2(Fe1-xAlx)17 Single Crystals, Journal of Alloys and Compounds, 1995.05

    H. Kato, J. Shiomi, T. Koide, T. Iriyama, M. Yamada, and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Magnetic Phase Transition in ε-(Mn1-xFex)3+δGe, Physica B, 1995.05

    T. Hori, H. Niida, H. Kato, Y. Yamaguchi and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Origin of Ferrimagnetic Ordering in Samarium Intermetallics, J. Magn. Magn. Mater., 1995.02

    M. Yamada, H. Kato, H. Ido and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Spin-Glass-Like Behavior in the Diluted Antiferromagnet FexMg1-xTiO3 Near the Percolation Concentration, J. Magn. Magn. Mater., 1995.02

    H. Kato, K. Iwai, A. Ito and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Field-Induced Magnetic Phase Transitions in Olivine-Type Compounds M2SiO4 (M=Mn, Fe and Co), J. Magn. Magn. Mater., 1995.02

    H. Kato, E. Untersteller, S. Hosoya, G. Kido, W. Treutmann

    Multiple Authorship (Including Foreigners)

  • First-Order Magnetization Process in Nd2(Fe1-xAlx)17 Single Crystals, J. Magn. Magn. Mater., 1995.02

    T. Koide, H. Kato, J. Shiomi, T. Iriyama, and M. Yamada

    Multiple Authorship (Including Foreigners)

  • Studies of Diluted Antiferromagnet Fe0.2Mg0.8TiO3 Percolation Concentration and Cluster-Glass, J. Phys. Soc. Jpn., 1995.01

    Atsuko Ito, Keiko Iwai and Hiroaki Kato

    Multiple Authorship (Including Foreigners)

  • HIGH FIELD MAGNETIZATION AND MOSSBAUER ABSORPTION IN (RXFe1-X)80Si12B8 AMORPHOUS ALLOYS (R-Pr,Nd,Sm,Tb,Dy AND Er), Proceedings of the Third International Symposium on Physics of Magnetic Materials, 1995.01

    N.Kurita, H.Kato, Y.Ando and T.Miyazaki

    Multiple Authorship (Including Foreigners)

  • Magnetic equation of state of Heisenberg ferromagnets, EuS and its Sr-diluted derivatives, in a high field region, J. Phys. Soc. Jpn., 1995.01

    K. Shiratori, Y. Nakagawa, H. Kato, K. Kohn and E. Kita

    Multiple Authorship (Including Foreigners)

  • Dynamics of First-Order Magnetic Phase Transition Relaxation Phenomena of Metamagnetism in FeTiO3, Physica B, 1994.07

    Hiroaki Kato and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • Metamagnetic Transitions of the Reentrant-Spin-Glass Fe0.65Mn0.35TiO3 Anomalous Dependence on the Sweep-Rate of the Magnetic Fields, Physica B, 1994.07

    Atsuko Ito, Chiyuki Oyama, Hiroko Aruga Katori, Tsuneaki Goto,Hiroaki Kato and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • On the Standard Measuring Method for Magnetic Properties of Permanent Magnet Materials with Very High Coercivity, Transactions of the Materials Research Society of Japan, 1994.01

    Yasuaki Nakagawa and Hiroaki Kato

    Multiple Authorship (Including Foreigners)

  • High-Resolution Neutron Powder Diffraction Study on Nitrogenated Nd2Fe17, J. Appl. Phys., 1993.05

    Tsuyoshi Kajitani, Yukio Morii, Satoru Funahashi, Takahiko Iriyama,Kurima Kobayashi, Hiroaki Kato, Yasuaki Nakagawa, and Kenji Hiraga

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization Study of Sm2Fe17Nx and Related Compounds, Jpn. J. Appl. Phys., 1993.05

    Jun Shiomi, Hiroaki Kato, Takahiko Iriyama, Motohiko Yamada, Giyuu Kido and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization Process in Sm2Fe17N3.0 Importance of Exchange-Enhanced Mixing of Excited J Multiplets, J. Appl. Phys., 1993.05

    Hiroaki Kato, Motohiko Yamada, Giyuu Kido, Yasuaki Nakagawa,Takahiko Iriyama, and Kurima Kobayashi

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization in R2Fe14B and R2Fe17Nx Compounds, Sci. Rep. RITU, 1993.01

    Hiroaki Kato, Motohiko Yamada, Dong Woo Lim, Takahiko Iriyama, Giyuu Kido and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • Neutron Powder Diffraction Study on Sm2Fe17NxHy with 0≦x<3.0 and 0≦y<1.0, Proc. 5th Int. Symp. Advanced Nuclear Energy Research, 1993.01

    T. Kajitani, Y. Morii, S. Funahashi, T. Iriyama, K. Kobayashi, H. Kato,Y. Nakagawa and K. Hiraga

    Multiple Authorship (Including Foreigners)

  • Magnetic Properties of the Single Magnetic Domain Particles of Sm2Fe17Nx Compounds, Journal of Alloys and Compound, 1993.01

    K. Kobayashi, T. Iriyama, T. Yamaguchi, H. Kato and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Magnetization Curves of the Reentrant-Spin-Glass Fe0.65Mn0.35TiO3 Dependence on the Sweep Rate of Magnetic Fields, Sci. Rep. RITU, 1993.01

    Atsuko Ito, Chiyuki Oyama, Hiroaki Kato and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization of Some Mn Alloys, Sci. Rep. RITU, 1993.01

    Tomiei Hori, Hiroshi Shiraishi, Hiroshi Niida, Hiroaki Kato, Giyuu Kido,Yasuo Yamaguchi and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • Sm2Fe17Nxの磁気特性, 日本応用磁気学会誌, 1992.12

    入山恭彦，小林久理真，加藤宏朗，中川康昭

    Multiple Authorship (Including Foreigners)

  • Effect of Nitrogen Content on Magnetic Properties of Sm2Fe17Nx (0<x<6), IEEE Trans. Magn., 1992.09

    T. Iriyama, K. Kobayashi, N. Imaoka, T. Fukuda, H. Kato and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Various Exchange Interactions and Anisotropies in Fe2SiO4 and Co2SiO4, J. Magn. Magn. Mater., 1992.01

    C. Brotzeller, H. Jaitner, B. Hock, O. Neumann, R. Geick, W. Treutmann,S. Hosoya and H. Kato

    Multiple Authorship (Including Foreigners)

  • Successive Phase Transitions of R2Fe14B (R=Heavy Rare Earth) in Ultra High Magnetic Fields, Proc. 7th Int. Symp. Magnetic Anisotropy and Coercivity in RE-TM Metal Alloys, 1992.01

    H. Kato, D. W. Lim, M. Yamada, G. Kido, Y. Nakagawa, H. A. Katori and T. Goto

    Multiple Authorship (Including Foreigners)

  • Temperature Dependence of Magnetic Properties of Sm2Fe17Nx (x≧3), Proceedings of The Sixth International Conference on Ferrites, Kyoto, 1992.01

    T. Iriyama, K. Kobayashi, A. Okamoto, H. Kato and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Magnetic Behavior of Fe0.2Mg0.8TiO3 and Fe0.3Mg0.7TiO3 Probed by Mossbauer Time Scale, Hyperfine Interactions, 1992.01

    Atsuko Ito, Keiko Iwai, Chiyuki Oyama, Setsu Morimoto and Hiroaki Kato

    Multiple Authorship (Including Foreigners)

  • Magnetic Properties of M7-xMnxGe6 (M=Co, Fe), J. Magn. Magn. Mater., 1992.01

    T. Hori, H. Shiraishi, H. Kato, G. Kido and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Spin Reorientation and First-Order Magnetization Processes in (Er1-xTbx)2Fe14B, J. Magn. Magn. Mater., 1992.01

    D.W. Lim, H. Kato, M. Yamada, G. Kido and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization Process and Spin Reorientation in (Nd1-xDyx)2Fe14B Single Crystals, Physical Review, 1991.11

    D.W. Lim, H. Kato, M. Yamada, G. Kido, and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization Process in Randomly Diluted Metamagnet Fe1-xMgxTiO3, J. Appl. Phys., 1991.04

    H. Kato, Y. Nakagawa, S. Hosoya, G. Kido, M. Nakagawa, and T. Fukuda

    Multiple Authorship (Including Foreigners)

  • Antiferromagnetic to Ferromagnetic Transition of DO19 Type (Mn1-xFex)3Sn1-δ, J. Magn. Magn. Mater., 1990.12

    T. Hori, H. Niida, Y. Yamaguchi, H. Kato and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • First-Order Magnetization Process in (Nd-Y)2Fe14B and (Nd-La)2Fe14B Single Crystals, J. Magn. Magn. Mater., 1990.12

    D.W. Lim, H. Kato, M. Yamada, G. Kido, Y. Nakagawa and S. Hirosawa

    Multiple Authorship (Including Foreigners)

  • First-Order Magnetization Process in Oblique-Easy-Axis Antiferromagnet FeTiO3, J. Magn. Magn. Mater., 1990.12

    H. Kato, M. Yamada, M. Nakagawa, G. Kido and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Measurements and Crystal-Field Calculations on Magnetic Properties of Nd2Fe14B-Type Alloys, Proc. 6th Int. Symp. Magnetic Anisotropy and Coercivity in RE-TM Alloys, 1990.01

    Nakagawa Y., Kato H., Lim D.W., Kido G. and Yamada M

    Multiple Authorship (Including Foreigners)

  • Magnetization of Nd2Fe14B-Type Compounds in High Magnetic Fields, Physica B, 1989.01

    Y. Nakagawa, G. Kido, M. Yamada, H. Kato, H. Hiroyoshi, N. Saito,D.W. Lim, S. Hirosawa ans M Sagawa

    Multiple Authorship (Including Foreigners)

  • Magnetic Anisotropy and Crystalline Electric Field in Multi-Component Nd2Fe14B-Type Alloys, Proc. 10th Int. Workshop Rare-Earth Magnets and Their Applications, Kyoto, 1989.01

    NAKAGAWA Y., KIDO G., KATO H., YAMADA M., DERUELLE M.C.D., LIM D.W. AND HIROSAWA S

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization Process and Crystalline Field in R2Co14B, Journal de Physique, 1988.12

    H. Kato, M. Yamada, G. Kido, Y. Nakagawa, S. Hirosawa and M. Sagawa

    Multiple Authorship (Including Foreigners)

  • Crystal-Field Analysis of the Magnetization Process in a Series of Nd2Fe14B-Type Compounds, Physical Review, 1988.07

    Motohiko Yamada, Hiroaki Kato, Hisao Yamamoto, and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • Magnetization Anomaly of Sm2Fe14B Single Crystals in High Magnetic Fields, J. Phys. Soc. Jpn., 1987.12

    Giyuu Kido, Hiroaki Kato, Motohiko Yamada, Yasuaki Nakagawa,Satoshi Hirosawa and Masato Sagawa

    Multiple Authorship (Including Foreigners)

  • First Order Magnetization Process in Pr2Fe14B Single Crystal, Solid State Communications, 1987.01

    H. Hiroyoshi, H. Kato, M. Yamada, N. Saito, Y. Nakagawa, S. Hirosawa and M. Sagawa

    Multiple Authorship (Including Foreigners)

  • Magnetic Anisotropy and High-Field Magnetization Process in R2Fe14B and R2Co14B, Proc. 5th Int. Symp. Magnetic Anisotropy and Coercivity in RE-TM Alloys, 1987.01

    Y. Nakagawa, G. Kido, H. Hiroyoshi, H. Kato, M. Yamada, S. Hirosawa and M. Sagawa

    Multiple Authorship (Including Foreigners)

  • High-Field Magnetization and Crystalline Field of R2Fe14B and R2Co14B, J. Magn. Magn. Mater., 1987.01

    H. Hiroyoshi, M. Yamada, N. Saito, H. Kato, Y. Nakagawa, S. Hirosawa and M Sagawa

    Multiple Authorship (Including Foreigners)

  • Crystal Field Theory of Magnetism in R2Fe14B, J. Magn. Magn. Mater., 1987.01

    M. Yamada, H. Kato, H. Hiroyoshi, H. Yamamoto and Y. Nakagawa

    Multiple Authorship (Including Foreigners)

  • Neutron Scattering Study of Magnetic Excitations in Oblique Easy-Axis Antiferromagnet FeTiO3, Journal of Physics C Solid State Physics, 1986.12

    H Kato, Y Yamaguchi, M Yamada, S Funahashi, Y Nakagawa and H Takei

    Multiple Authorship (Including Foreigners)

  • Re-Examination of the Magnetic Structure of FeTiO3, Solid State Communications, 1986.01

    Y. Yamaguchi, H. Kato, H. Takei, A. I. Goldman and G. Shirane

    Multiple Authorship (Including Foreigners)

  • Mossbauer Spectrometer for Measurements in High Magnetic Fields, Sci. Rep. RITU, 1986.01

    Hideya Onodera, Hiroaki Kato, Hisao Kobayashi, Junji Iida, Shigeto Miura,Hisao Yamamoto and Yasuaki Nakagawa

    Multiple Authorship (Including Foreigners)

  • Non-Collinear Spin Structure and Magnetization Process of Tm2Fe14B, Solid State Communications, 1985.11

    M. Yamada, Y. Yamaguchi, H. Kato, H. Yamamoto, Y. Nakagawa, S. Hirosawa and M. Sagawa

    Multiple Authorship (Including Foreigners)

  • Coexistence of Ising- and XY-Like Magnons in FeTiO3, J. Magn. Magn. Mater., 30 447-454, 1983.01

    H. Kato, S. Funahashi, Y. Yamaguchi, M. Yamada and H. Takei

    Multiple Authorship (Including Foreigners)

  • On the Obliqueness of the Easy Axis in Collinear Antiferromagnetic FeTiO3, Solid State Communications, 408-412 1368-1372, 1983.01

    H. Kato, Y. Yamaguchi, M. Ohashi, M. Yamada, H. Takei and S. Funahashi

    Multiple Authorship (Including Foreigners)

  • Metamagnetic Phase Transitions in FeTiO3, J. Phys. Soc. Jpn., 310 2596-2598, 1982.06

    Hiroaki Kato, Motohiko Yamada, Hiroshi Yamauchi, Hidetoshi Hiroyoshi,Humihiko Takei and Hiroshi Watanabe

    Multiple Authorship (Including Foreigners)

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Books

  • High-field Investigations on Exchange Coupling in R-Fe Intermetallics and Hard/soft Nanocomposite Magnets, Springer Verlag, 2006.01

    Hiroaki Kato, Terunobu Miyazaki and Mitsuhiro Motokawa

  • High-Field Magnetization Process and Crystalline-Electric-Field Interaction in Rare-Earth Permanent-Magnet Materials, Springer Verlag, 2002.01

    Hiroaki Kato, Terunobu Miyazaki and Mitsuhiro Motokawa

  • Magnetic Measurements on Shock-Consolidated Sm2Fe17Nx Bulk Magnets under Steady Fields of up to 15 T, Elsevier Science B. V., 1995.01

    T. Mashimo, X. S. Huang, S. Hirosawa, K. Makita, H. Kato, S. Mitsudo and M. Motokawa

Grant-in-Aid for Scientific Research

  • Grant-in-Aid for Scientific Research(C)，1997.04 - 1999.03

Presentations

  • 21st Workshop on Rare-Earth Permanent Magnets and their Applications, International presentation, 2010.08 - 2010.09, Oral presentation (invited, special)