Magnetic correlations in nanostructured ferromagnets

被引：156

作者：

Löffler, JF ^{[1
]}

Braun, HB

Wagner, W

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] CALTECH, WM Keck Lab, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.85.1990

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Small-angle neutron scattering experiments on nanostructured Fe, Co, and Ni reveal grain-size dependent magnetic correlations across grain boundaries. In Fe, a minimum of the correlation length is observed for grain sizes of the order of the bulk domain-wall width where the coercive field has a maximum. The results are explained within a generalization of the random-anisotropy model that takes into account domain-wall formation within grains and reduced interface coupling.

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页码：1990 / 1993

页数：4

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