Magnetoresitance in point contacts of the Heusler alloy Co2Cr0.6Fe0.4Al

被引：26

作者：

Clifford, E ^{[1
]}

Venkatesan, M ^{[1
]}

Gunning, R ^{[1
]}

Coey, JMD ^{[1
]}

机构：

[1] Trinity Coll Dublin, Dept Phys, Dublin 2, Ireland

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 131卷 / 01期

基金：

爱尔兰科学基金会;

关键词：

half metal; Heusler alloy; magnetoresistance; spin polarisation;

D O I：

10.1016/j.ssc.2004.04.008

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Following a recent report predicting half-metallicity Of Co2Cr0.6Fe0.4Al, we have examined point contacts of this material. Large magnetoresistances (up to 80%) have been observed at room temperature in small fields (10 rnT). Magnetostriction in these fields is negligible. A spin polarisation of 81% is inferred. Mossbauer spectra show that 90% of the iron is ordered. The magnetisation of the alloy is 3.65(muB) per formula unit, and its Curie temperature is 665 K. (C) 2004 Elsevier Ltd. All rights reserved.

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页码：61 / 64

页数：4

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