Exchange Bias Effect in CoO@Fe3O4 Core-Shell Octahedron-Shaped Nanoparticles

被引：31

作者：

Fontaina Troitino, Nerio ^{[1
]}

Rivas-Murias, Beatriz ^{[2
]}

Rodriguez-Gonzalez, Benito ^{[1
]}

Salgueirino, Veronica ^{[1
]}

机构：

[1] Univ Vigo, Dept Fis Aplicada, Vigo 36310, Spain

[2] Univ Santiago de Compostela, Ctr Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain

来源：

CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 19期

基金：

欧洲研究理事会;

关键词：

MAGNETIC-PROPERTIES; ROOM-TEMPERATURE; ANISOTROPY; BILAYERS; FILMS; HETEROSTRUCTURES; NANOCRYSTALS; DEPOSITION; MEMORY; MODEL;

D O I：

10.1021/cm501951u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Increased coercive and tunable exchange bias field values were registered in hybrid CoO@Fe3O4 core-shell octahedron-shaped nanoparticles of different average size. In this strained morphology, the metal cation chemical potentials at the interface between the antiferromagnetic and ferrimagnetic oxides become a very dynamic variable. This causes the effective magnetic anisotropy to increase and the type of interface to change after growing the magnetite shell epitaxially onto the cobalt oxide {111} surface facets and, consequently, to tune the exchange bias effect.

引用

页码：5566 / 5575

页数：10

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