Antiphase boundaries induced exchange coupling in epitaxial Fe3O4 thin films

被引：45

作者：

Arora, SK ^{[1
]}

Sofin, RGS ^{[1
]}

Nolan, A ^{[1
]}

Shvets, IV ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, Dept Phys, SFI Nanosci Labs, Dublin 2, Ireland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 286卷

关键词：

magnetite; thin epitaxial films; exchange bias; grain boundaries;

D O I：

10.1016/j.jmmm.2004.09.066

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

We have observed an exchange bias effect on field cooling of epitaxial magnetite, Fe3O4, films on MgO (1 0 0) substrates. We attribute this effect to the presence of antiphase boundaries (APBs). Magnitude of the exchange bias field (H-e) strongly depends on the thermo-magnetic history of the sample. The strength of the H-e was found to increase with an increase in film thickness and is attributed to the strain driven redistribution of atoms in the vicinity of APBs leading to enhanced antiferromagnetic exchange interactions. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：463 / 467

页数：5

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