Grain-boundary-induced spin disorder in nanocrystalline gadolinium

被引：14

作者：

Doebrich, F. ^{[1
]}

Elmas, M. ^{[1
]}

Ferdinand, A. ^{[1
]}

Markmann, J. ^{[1
]}

Sharp, M. ^{[2
]}

Eckerlebe, H. ^{[2
]}

Kohlbrecher, J. ^{[3
]}

Birringer, R. ^{[1
]}

Michels, A. ^{[1
]}

机构：

[1] Univ Saarland, D-66041 Saarbrucken, Germany

[2] GKSS Forschungszentrum Geesthacht GmbH, D-21502 Geesthacht, Germany

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 15期

关键词：

NEUTRON-DIFFRACTION; CURIE-TEMPERATURE; GD; DISTRIBUTIONS; SCATTERING; MAGNETISM;

D O I：

10.1088/0953-8984/21/15/156003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Based on experimental magnetic-field-dependent neutron scattering data, we have calculated the autocorrelation function of the spin misalignment of nanocrystalline (160)gadolinium. The analysis suggests the existence of two characteristic length scales in the spin system: the smaller one is about 5 nm and is attributed to the defect cores of the grain boundaries, whereas the larger length scale is of the order of the average crystallite size D = 21 nm and presumably describes the response of the magnetization to the magnetic anisotropy field of the individual crystallites.

引用

页数：5

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