Ferromagnetism and Electronic Structures of Nonstoichiometric Heusler-Alloy Fe3-xMnxSi Epilayers Grown on Ge(111)

被引：102

作者：

Hamaya, K. ^{[1
,2
]}

Itoh, H. ^{[3
]}

Nakatsuka, O. ^{[4
]}

Ueda, K. ^{[1
]}

Yamamoto, K. ^{[1
]}

Itakura, M. ^{[5
]}

Taniyama, T. ^{[2
,6
]}

Ono, T. ^{[7
]}

Miyao, M. ^{[1
]}

机构：

[1] Kyushu Univ, Dept Elect, Fukuoka 8190395, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

[3] Kansai Univ, Dept Pure & Appl Phys, Suita, Osaka 5648680, Japan

[4] Nagoya Univ, Dept Crystalline Mat Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[5] Kyushu Univ, Dept Appl Sci Elect & Mat, Fukuoka 8168580, Japan

[6] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[7] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 13期

关键词：

MAGNETIC-PROPERTIES; SILICON; FE3SI;

D O I：

10.1103/PhysRevLett.102.137204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For the study of ferromagnetic materials which are compatible with group-IV semiconductor spintronics, we demonstrate control of the ferromagnetic properties of Heusler-alloy Fe3-xMnxSi epitaxially grown on Ge(111) by tuning the Mn composition x. Interestingly, we obtain L2(1)-ordered structures even for nonstoichiometric atomic compositions. The Curie temperature of the epilayers with x approximate to 0.6 exceeds 300 K. Theoretical calculations indicate that the electronic structures of the nonstoichiometric Fe3-xMnxSi alloys become half-metallic for 0.75 <= x <= 1.5. We discuss the possibility of room-temperature ferromagnetic Fe3-xMnxSi/Ge epilayers with high spin polarization.

引用

页数：4

共 28 条

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