Field-cooling dependence of exchange bias in a granular system of Fe nanoparticles embedded in an Fe oxide matrix

被引：125

作者：

Del Bianco, L

Fiorani, D

Testa, AM

Bonetti, E

Signorini, L

机构：

[1] CNR, Ist Struttura Mat, I-00016 Monterotondo, Rome, Italy

[2] Univ Bologna, Dipartimento Fis, Ist Nazl Fis Mat, I-40127 Bologna, Italy

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.70.052401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exchange bias properties of a granular system composed of Fe nanoparticles (mean size similar to6 nm) embedded in an Fe oxide matrix have been studied. The effect of the cooling field on the exchange field, coercivity and remanent magnetization at T=5 K has been investigated. The observed variations are explained in terms of interfacial exchange coupling between a ferromagnetic phase (the Fe particles) and a disordered magnetic phase (the oxide matrix), whose spin configuration is strongly affected by the cooling field.

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页码：052401 / 1

页数：4

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