研究者詳細 - 小山　佳一

論文 - 小山　佳一

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A.N. Nwodo, R. Kobayashi, T. Wakamori, Y. Matsumoto, Y. Mitsui, R.Y. Umetsu, M. Hiroi, K. Takahashi, Y. Uwatoko, K. Koyama . Magnetic Phase Transition of Mn1.9Fe0.1Sb0.9Sn0.1 . IEEE Magn. Lett.9 1400204-1 - 1400204-4 2018年査読

R. Kobayashi, Y. Mitsui, K. Takahashi, S. Uda, K. Koyama . In-field annealing and quenching for ferromagnetic MnBi under 19 T . IEEE Trans. on Magn.55 1000204-1 - 1000204-4 2018年査読

Y. Mitsui, R. Kobayashi, Y. Takanaga, A. Takaki, R.Y Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama . Different Magnetic Field Effects on the ϵ-τ Phase Transformation Between (Mn, Zn)-Al and Mn-Al-C . IEEE Trans. on Magn.55 2100704-1 - 2100704-4 2018年査読

Nwodo A., Kobayashi R., Wakamori T., Matsumoto Y., Mitsui Y., Hiroi M., Takahashi K., Umetsu R., Uwatoko Y., Koyama K. . Quasi-First Order Magnetic Transition in Mn₁.₉Fe₀.₁Sb₀.₉Sn₀.₁ . MATERIALS TRANSACTIONS59 ( 3 ) 348 - 352 2018年査読

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人日本金属学会

The magnetic and structural properties of ferrimagnetic (FRI) Mn1.9Fe0.1Sb0.9Sn0.1 with a Cu2Sb-type tetragonal structure were studied by magnetization and high field X-ray diffraction (XRD) measurements in 10 ≤ T ≤ 773 K and in magnetic fields μ0H up to 5 T. The lattice parameters a and c at 285 K were estimated to be 0.407 nm and 0.655 nm, respectively. The saturation magnetization at 10 K was determined to be 39.1 Am2/kg. It was observed that a first order magnetic transition (FOMT) with a thermal hysteresis occurred in the vicinity of 310 K under low magnetic fields. This FOMT disappeared easily by applying magnetic fields over 0.4 T.

DOI： 10.2320/matertrans.m2017291

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CiNii Research

小山佳一、山下美咲、小林領太、三井好古、高橋弘紀、宇田聡 . 15T級強磁場中小型急冷炉の開発 . 鹿児島大学理学部紀要50 1 - 5 2017年12月

小山佳一、島田大輔、安達義也、三井好古、廣井政彦、上床美也 . 高圧力下におけるMn2Sb1-xGex (x = 0.05, 0.8, 0.1)の磁気特性 . 鹿児島大学理学部紀要50 12 - 18 2017年12月

小山佳一、平敦志、三井好古、高橋弘紀 . 強磁場中固相焼結で合成したMnBiの特性評価 . 鹿児島大学理学部紀要50 6 - 11 2017年12月

Mitsui Y. . High field X-ray diffraction study for Ni<inf>46.4</inf>Mn<inf>38.8</inf>In<inf>12.8</inf>Co<inf>2.0</inf> metamagnetic shape memory film . Metals7 ( 9 ) 2017年9月査読

D. Miyazaki, Y. Mitsui, R. Y. Umetsu, K. Takahashi, S. Uda, K. Koyama . Enhancement of the Phase Formation Rate during In-Field Solid-Phase Reactive Sintering of Mn-Bi . Mater. Trans.58 720 - 728 2017年4月査読

R. Kobayashi, Y. Mitsui, R.Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama . Annealing temperature and magnetic field effects for ε−τ transformation in Mn-Al alloys . IEEE Magn. Lett.8 1400704 2017年1月査読

S. Yoshinaga, Y. Mitsui, R.Y. Umetsu, Y. Uwatoko, K. Koyama . Magnetic properties of weak itinerant electron ferromagnet CrAlGe . J. Phys. Conf. Ser.868 012018 2017年1月査読

S. Yoshinaga, S. Miura, T. Kanomata, Y. Mitsui, K. Koyama . Pressure Effect on Magnetism of Weak Itinerant Electron Ferromagnet Ni74.6Al25.4 . IEEE Magn. Lett.8 140043 2017年1月査読

T. Wakamori, Y. Mitsui, K. Takahashi, R.Y. Umetsu, Y. Uwatoko, M. Hiroi, K. Koyama . Thermal Transformation Arrest Phenomena in Mn2Sb0.9Sn0.1 . IEEE Magn. Lett.8 1402404 2017年1月査読

M. Hiroi, T. Tazoko, H. Sano, I. Shigeta, K. Koyama, A. Kondo, K. Kindo, H. Manaka, N. Terada . High-field magnetization of Heusler compound Fe2Mn1-xVxSi . Phys. Rev. B95 014410 2017年1月査読

M. Hiroi, H. Sano, T. Tazoko, I. Shigeta, M. Ito, K. Koyama, H. Manaka, N, Terada, M. Fujii, A. Kondo, K. Kindo . Magnetic and electrical properties of Heusler compounds Ru2Cr1-xXxSi (X = V, Ti) . J. Alloys. Comp.694 1376 - 1382 2017年1月査読

M. Yamashita, K. Abematsu, K. Takahashi, Y. Mitsui, K. Koyama . Development of a compact quenching furnace used under high magnetic fields . IEEE Magn. Lett.8 1400704 2017年1月査読

R. Kobayashi, Y. Mitsui, R.Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama . Magnetic-Field-Induced Acceleration of Phase Formation in τ-Mn-Al . Mater. Trans.58 1511 - 1518 2017年査読

Shigeta I. . Fabrication and characterization of epitaxial films of superconductor NbN and highly spin-polarized heusler alloy Co<inf>2</inf>2Fe<inf>0.4</inf>Mn<inf>0.6</inf>Si . IEEE Magnetics Letters8 1 - 5 2017年査読

Kobayashi R. . Effects of Annealing Temperature and Magnetic Field on the ϵ-τ Phase Transformation in Mn-Al Alloys . IEEE Magnetics Letters8 2017年査読

Yamashita M., Abematu K., Takahashi K., Mitsui Y., Koyama K. . Development of a Compact Quenching Furnace for Use in High Magnetic Fields . IEEE Magnetics Letters8 2017年査読

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE Magnetics Letters

A compact quenching furnace used under high magnetic fields was developed. The range of the annealing temperature and magnetic field of this apparatus was T ≤ 643 K and μ0H ≤ 15 T. The cooling rate was about 40 K/s in magnetic field of μ0H = 15 T. As a performance test of the furnace, an in-field heat treatment at 643 K and in-field quenching were carried out for a Mn-Bi ferromagnet. The magnetic field effect on the phase equilibrium between MnBi and Mn1.08Bi was examined.

DOI： 10.1109/LMAG.2016.2621733

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