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ID 30707
本文ファイル
著者
Ye, Mao
Miura, Yoshio
Shirai, Masafumi
Cui, Yi-tao
Ueda, Shigenori
Kobayashi, Keisuke
Kainuma, Ryosuke
Shishido, Toetsu
Fukushima, K
Kanomata, Takeshi
NDC
物理学
抄録(英)
We have revealed the underlying mechanism of the martensitic phase transition (MPT) in a new class of ferromagnetic shape memory alloys, Ni2Mn1+xSn1-x, by the combination of bulk-sensitive hard-x-ray photoelectron spectroscopy and a first-principles density-functional calculation. The Ni 3d eg state in the cubic phase systematically shifts towards the Fermi energy with an increase in the number of Mn atoms substituted in the Sn sites. An abrupt decrease of the intensity of the Ni 3d eg states upon MPT for x=0.36–0.42 has been observed in the vicinity of the Fermi level. The energy shift of the Ni 3d minority-spin eg state in the cubic phase originates from hybridization with the antiferromagnetically coupled Mn in the Sn site. Below the MPT temperature, the Ni 3d state splits into two levels located below and above the Fermi energy in order to achieve an energetically stable state.
掲載誌名
Physical Review Letters
104巻
17号
開始ページ
176401-1
終了ページ
176401-4
出版年月日
2010-04-26
出版者
The American Physical Society
ISSN
0031-9007
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
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著者版フラグ
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権利情報
Copyright (c) 2010 The American Physical Society
関連情報URL
部局名
理学研究科