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Hu, W.*; 林 好一*; 福村 知昭*; 赤木 和人*; 塚田 捷*; 八方 直久*; 細川 伸也*; 大和田 謙二; 高橋 正光; 鈴木 基寛*; et al.
Applied Physics Letters, 106(22), p.222403_1 - 222403_5, 2015/06
被引用回数:39 パーセンタイル:81.72(Physics, Applied)The local atomic structures around Co in high temperature diluted ferromagnetic semiconductor Co-doped TiO has been investigated using X-ray fluorescence holography and X-ray absorption fine structure experiments. While the Co atoms in the TiCoO simply substituted for Ti sites in the rutile structure, a suboxidic arrangement of CoOTi was found to form around Co in the TiCoO films. First-principles calculations supported the stability of the aggregated suboxidic clusters in the rutile TiO. The suboxidic coordination may be the source of strong exchange interaction, resulting in the high Curie temperature in Co-dopedTiO.
高木 成幸*; 飯島 祐樹*; 佐藤 豊人*; 齋藤 寛之; 池田 一貴*; 大友 季哉*; 三輪 和利*; 池庄司 民夫*; 青木 勝敏*; 折茂 慎一*
Angewandte Chemie; International Edition, 54(19), p.5650 - 5653, 2015/05
被引用回数:30 パーセンタイル:67.58(Chemistry, Multidisciplinary)Despite many exploratory studies over the past several decades, the presently known transition metals that form homoleptic transition-metal hydride complexes are limited to the Groups 7-12. Here we present evidence for the formation of MgCrH, containing the first Group 6 hydride complex [CrH.
高木 成幸*; 齋藤 寛之; 遠藤 成輝; 佐藤 龍太郎*; 池庄司 民夫*; 松尾 元彰*; 三輪 和利*; 青木 勝敏; 折茂 慎一*
Physical Review B, 87(12), p.125134_1 - 125134_6, 2013/03
被引用回数:12 パーセンタイル:53.67(Materials Science, Multidisciplinary)A metallic perovskite-type hydride LiNiH was synthesized based on first-principles prediction. We theoretically examined its electronic structure and found that half of the Ni-H derived antibonding states are occupied and that the modest thermodynamic stability depends on a delicate balance between (1) destabilization and (2) alleviation of compression frustration in corner-sharing octahedra, both of which arise from occupation of antibonding states. Through density-functional analyses of the electronic structure and lattice instability extending over LiH series ( = Fe, Co, Ni, and Cu), we showed that the balance is in fact reflected in their thermodynamic stability.
松尾 元彰*; 齋藤 寛之; 町田 晃彦; 佐藤 龍太郎*; 高木 成幸*; 三輪 和利*; 綿貫 徹; 片山 芳則; 青木 勝敏; 折茂 慎一*
RSC Advances (Internet), 3(4), p.1013 - 1016, 2013/01
被引用回数:16 パーセンタイル:52.39(Chemistry, Multidisciplinary)The novel complex hydride YLiFeH with the Fe-H complex anion ([FeH]) was synthesized by hydrogenation of YFe together with additional Li. Li adjusts the original imbalanced charge between Y and [FeH] by donating an electron to convert into Li during the hydrogenation, resulting in the formation of the well charge-balanced state of YLi[FeH].