Structural and magnetic properties of Co2FeAl1-xSix

被引：62

作者：

Balke, Benjamin ^{[1
]}

Fecher, Gerhard H. ^{[1
]}

Felser, Claudia ^{[1
]}

机构：

[1] Univ Mainz, Inst Anorgan & Analyt Chem, D-55099 Mainz, Germany

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 24期

关键词：

D O I：

10.1063/1.2748341

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work reports about the structural and magnetic properties of the quaternary Heusler alloy Co2FeAl1-xSix with varying Si concentration. The structure of the Co2FeAl1-xSix solid solution was investigated by means of x-ray diffraction and differential scanning calorimetry. It is found that the alloys exhibit the L2(1) structure for x >= 0.4. Depending on the Si concentration x, a structural phase transition is found at temperatures between 1000 and 1200 K. The transition temperature decreases with increasing Si content x. The magnetic properties were studied using low temperature magnetometry. For x >= 0.4, the magnetization of the compounds is in agreement with a Slater-Pauling-like behavior and with the values obtained from ab initio calculations. For x <= 0.4, enlarged magnetic moments are found due to disorder. The enlarged values are explained by an increase of the Co spin moments and enhanced orbital moments. (c) 2007 American Institute of Physics.

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页数：3

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