Detection of spin coupling in iron nanoparticles with small angle neutron scattering

被引：25

作者：

Ijiri, Y ^{[1
]}

Kelly, CV

Borchers, JA

Rhyne, JJ

Farrell, DF

Majetich, SA

机构：

[1] Oberlin Coll, Dept Phys & Astron, Oberlin, OH 44074 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA

[4] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 24期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1947906

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Aggregates of monodisperse iron-based nanoparticles were investigated by small-angle neutron scattering. The field dependence of the scattering intensity showed marked differences for particles depending on size and degree of oxidation. The angular dependence of the intensity indicated magnetic regions within an oxidized sample with spins perpendicular to the applied field, which dominated the scattering at the diffraction peak. The unexpected results are interpreted in terms of an iron core that is exchange coupled to an iron oxide shell. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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