研究者詳細 - 小山　佳一

論文 - 小山　佳一

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Goto J., Kakimoto T., Fujii S., Koyama K. . Site Preference and Stabilization of Antiferromagnetism in M-Substituted Mn₂₋xMxSb (M = Ti, Cr, Co, or Cu) . MATERIALS TRANSACTIONS56 ( 3 ) 415 - 423 2015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

We applied first-principles total-energy calculations to several compounds Mn2-xMxSb (M = Ti, Cr, Co, or Cu) to calculate the total energy. The results indicate that the Ti and Cu (Cr and Co) atoms prefer the Mn(II) site to the Mn(I) site [Mn(I) to Mn(II)]. These results are consistent with experimental observations. The antiferromagnetism (AF) [ferrimagnetism (FR)] is more stable than FR (AF) upon decreasing (increasing) the distance between the Mn(II) and Sb atoms in the z direction in all Mn2-xMxSb systems. This result indicates that the environment around the Mn atom plays a very important role in the stabilization of the AF state, as is the case with Mn2Sb1-xAsx systems. For Mn2-xCoxSb systems, the atomic disorder between the Mn and Co atoms is insensitive to the relative stability of two magnetic phases AF and FR.

DOI： 10.2320/matertrans.m2014417

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T.M. Pan, F.H. Chen, M.N. Hung, J.L. Her, K. Koyama . Structural Properties and Electrical Characteristics of High-kappa Tm2O3 Gate Dielectrics for InGaZnO Thin Film Transistors . Sci. Adv. Mater. 6 ( 9 ) 1973 - 1978 2014年9月査読

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