Field-cooling dependence of exchange bias in a granular system of Fe nanoparticles embedded in an Fe oxide matrix
Field-cooling dependence of exchange bias in a granular system of Fe nanoparticles embedded in an Fe oxide matrix
复制标题
DOI：
10.1103/physrevb.70.052401
复制
发表时间：
2004-08-01
影响因子：
3.7
通讯作者：
Signorini, L
中科院分区：
文献类型：
--
作者：
Del Bianco, L;Fiorani, D;Signorini, L
研究了由平均粒径约为6nm的铁纳米颗粒嵌入铁氧化物基体中组成的颗粒体系的交换偏置性质。研究了T= 5K时冷却场对交换场、磁化率和回复磁化强度的影响。所观察到的变化被解释在铁磁相（Fe颗粒）和无序的磁性相（氧化物基体），其自旋配置的强烈影响的冷却场之间的界面交换耦合。
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.