http://www.cnr.it/ontology/cnr/individuo/prodotto/ID167422
Glassy dynamics in the exchange bias properties of the iron/iron oxide nanogranular system (Articolo in rivista)
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- Label
- Glassy dynamics in the exchange bias properties of the iron/iron oxide nanogranular system (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.73.092403 (literal)
- Alternative label
Fiorani, D (1); Del Bianco, L (2); Testa, AM (1); Trohidou, KN (3) (2006)
Glassy dynamics in the exchange bias properties of the iron/iron oxide nanogranular system
in Physical review. B, Condensed matter and materials physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Fiorani, D (1); Del Bianco, L (2); Testa, AM (1); Trohidou, KN (3) (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1) Istituto di Struttura della Materia--CNR, 00016 Monterotondo Scalo (Roma), Italy;
2) Dipartimento di Fisica, Università di Bologna and CNR-INFM, I-40127 Bologna, Italy;
3) Institute of Materials Science, NCSR Demokritos, 15310 Athens, Greece; (literal)
- Titolo
- Glassy dynamics in the exchange bias properties of the iron/iron oxide nanogranular system (literal)
- Abstract
- We have observed a glassy dynamics of the exchange bias properties in a granular system composed of Fe nanoparticles dispersed in a structurally and magnetically disordered (cluster glasslike) Fe oxide matrix. The exchange field, measured at T=5 K, increases with increasing the time t(w) spent at T=50 K, after applying the cooling field. During t(w), the oxide phase evolves towards a lower energy configuration, resulting in a stronger interface exchange coupling with the Fe particle moments. Monte Carlo simulations on core/shell nanoparticles reproduce such aging effect, provided that a shell random anisotropy is assumed. (literal)
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