The finite-temperature densities of states for half-metallic ferromagnets

被引：70

作者：

Skomski, R ^{[1
]}

Dowben, PA

机构：

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Ctr Mat Res & Anal, Lincoln, NE 68588 USA

来源：

EUROPHYSICS LETTERS | 2002年 / 58卷 / 04期

关键词：

D O I：

10.1209/epl/i2002-00430-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A unitary spinor transformation is used to show that the spin-down density of states ( DOS) of half-metallic ferromagnets becomes nonzero at finite temperatures. In a strict sense, this thermally activated spin mixing means that half-metallic ferromagnetism is limited to zero temperature. Similar effects are created by crystal imperfections, interfaces, and surfaces. The calculations, which imply that the finite-temperature resistivity of an individual spin channel is never infinite, are used to discuss recent experimental work on half-metallic oxides and Heusler-type alloys.

引用

页码：544 / 548

页数：5

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