Origin of low Gilbert damping in half metals

被引：93

作者：

Liu, Chunsheng ^{[1
,2
]}

Mewes, Claudia K. A. ^{[1
,2
]}

Chshiev, Mairbek ^{[3
]}

Mewes, Tim ^{[1
,2
]}

Butler, William H. ^{[1
,2
]}

机构：

[1] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[2] Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA

[3] Spintec, CEA, CNRS, F-38054 Grenoble, France

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 02期

基金：

美国国家科学基金会;

关键词：

cobalt alloys; damping; density functional theory; EHT calculations; germanium alloys; magnetic relaxation; magnetisation; magnetoelectronics; magnetomechanical effects; manganese alloys; silicon alloys; tight-binding calculations;

D O I：

10.1063/1.3157267

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using a combination of first-principles calculations and an extended Huumlckel tight binding model this letter reports on the origin of the low Gilbert damping in half metals. This approach enables the prediction of the lower limit for the magnetization relaxation in a wide variety of material systems relevant for future spintronic applications. For the two model systems Co2MnGe and Co2MnSi minimal damping parameters of 1.9x10(-4) and 0.6x10(-4) are predicted.

引用

页数：3

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