Magnetic nanoparticles

被引：1489

作者：

Kodama, RH ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 200卷 / 1-3期

关键词：

fine particle systems; surface magnetism; spin waves; macroscopic quantum phenomena in magnetic systems; metals and alloys; ferrimagnetics; antiferromagnetics;

D O I：

10.1016/S0304-8853(99)00347-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Intrinsic properties of magnetic nanoparticles are reviewed, with special emphasis on the effects of finite size on zero-temperature spin ordering, magnetic excitations, and relaxation. Effects on zero-temperature spin ordering include moment enhancement due to band narrowing in 3d transition metal particles, surface spin disorder in ferrite particles, and multi-sublattice states in antiferromagnetic oxide particles. Magnetic excitations include discretized spin wave modes, and surface modes that have been detected by quasielastic neutron scattering. Thermally activated and quantum tunneling relaxation is discussed in the context of ideal single-domain particles, as well as particles with surface spin disorder. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：359 / 372

页数：14

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