The exchange bias properties of a granular system composed of Fe nanoparticles (mean size ~6 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.

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

DEL BIANCO, LUCIA;BONETTI, ENNIO;
2004

Abstract

The exchange bias properties of a granular system composed of Fe nanoparticles (mean size ~6 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.
2004
L.Del Bianco; D.Fiorani; A.Testa; E.Bonetti; L.Signorini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/14607
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