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EnglishThe 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.
| Titolo: | Field-cooling dependence of exchange bias in a granular system of Fe nanoparticles embedded in a Fe oxide matrix |
| Autore/i: | DEL BIANCO, LUCIA; D. Fiorani; A. Testa; BONETTI, ENNIO; L. Signorini |
| Autore/i Unibo: | |
| Anno: | 2004 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.70.052401 |
| 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. |
| Data prodotto definitivo in UGOV: | 2005-10-11 18:11:12 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/14607
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