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.
L.Del Bianco, D.Fiorani, A.Testa, E.Bonetti, L.Signorini (2004). Field-cooling dependence of exchange bias in a granular system of Fe nanoparticles embedded in a Fe oxide matrix. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 70, 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.
