期刊
APPLIED PHYSICS LETTERS
卷 95, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3157267
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
资金
- NSF [DMR 0213985, ECCS-529369, DMR 0804243]
- Information Storage Industry Consortium
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0804243] Funding Source: National Science Foundation
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.
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