Structure, magnetic property, and spin polarization Of CO2FeAlxSi1-x Heusler alloys

被引：148

作者：

Nakatani, T. M.

Rajanikanth, A.

Gercsi, Z.

Takahashi, Y. K.

Inomata, K.

Hono, K. ^{[1
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050047, Japan

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

[3] JST, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 03期

基金：

日本学术振兴会;

关键词：

D O I：

10.1063/1.2767229

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the spin polarization of Co2FeAlxSi1-x (x= 0.0, 0.3, 0.5, 0.7) bulk alloys measured by the point contact Andreev reflection method. All the Co2FeAlx,Si1-x, alloys had an L2(1) structure along with A2- and B2-type disorder. Several off-stoichiometric alloys (Co2FeyAl0.5Si0.5) were prepared to understand the effect of the compositional deviation from the stoichiometry on the spin polarization. By substituting Al for Si, the spin polarization changed from 0.57 +/- 0.01 for x=0.0 to a maximum value of 0.60 +/- 0.01 for x=0.5. The off-stoichiometric alloys had spin polarizations of 0.57 -0.60 +/- 0.01. Ab initio calculations were performed to interpret the effect of Al addition as well as the effect of disorder on the magnetic properties and on the electronic structure. (c) 2007 American Institute of Physics.

引用

页数：8

共 24 条

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