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 / L.Del Bianco; D.Fiorani; A.Testa; E.Bonetti; L.Signorini. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 70:(2004), pp. 052401-1-052401-4. [10.1103/PhysRevB.70.052401]
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
