High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy

被引：121

作者：

Bainsla, Lakhan ^{[1
,2
]}

Suresh, K. G. ^{[1
]}

Nigam, A. K. ^{[3
]}

Raja, M. Manivel ^{[4
]}

Varaprasad, B. S. D. Ch. S. ^{[2
]}

Takahashi, Y. K. ^{[2
]}

Hono, K. ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India

[2] Natl Inst Mat Sci, Magnet Mat Unit, Tsukuba, Ibaraki 3050047, Japan

[3] Tata Inst Fundamental Res, Dept Condensed Matter & Mat Sci, Mumbai 400005, Maharashtra, India

[4] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 20期

关键词：

CHEMICAL ORDER; RESISTIVITY; COBALT;

D O I：

10.1063/1.4902831

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the structure, magnetic property, and spin polarization of CoFeMnGe equiatomic quaternary Heusler alloy. The alloy was found to crystallize in the cubic Heusler structure (prototype LiMgPdSn) with considerable amount of DO3 disorder. Thermal analysis result indicated the Curie temperature is about 750 K without any other phase transformation up to melting temperature. The magnetization value was close to that predicted by the Slater-Pauling curve. Current spin polarization of P = 0.70 +/- 0.01 was deduced using point contact andreev reflection measurements. The temperature dependence of electrical resistivity has been fitted in the temperature range of 5-300 K in order to check for the half metallic behavior. Considering the high spin polarization and Curie temperature, this material appears to be promising for spintronic applications. (C) 2014 AIP Publishing LLC.

引用

页数：6

共 39 条

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