Ferromagnetic behavior and exchange bias effect in akaganeite nanorods
- Condensed Matter Physics Laboratory, Vinca Institute of Nuclear Science, University of Belgrade, P.O. Box 522, 11001 Belgrade (Serbia)
- Laboratoire CSPBAT, UMR 7244 CNRS Université Paris 13, 93017 Bobigny Cedex (France)
- Department for Materials Synthesis, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)
- CNRS, University of Orleans, F-45071 Orleans 2 (France)
We report ferromagnetic-like properties and exchange bias effect in akaganeite (β-FeOOH) nanorods. They exhibit a Néel temperature T{sub N} = 259 K and ferromagnetic-like hysteresis behavior both below and above T{sub N}. An exchange bias effect is observed below T{sub N} and represents an interesting behavior for akaganeite nanorods. These results are explained on the basis of a core-shell structure in which the core has bulk akaganeite magnetic properties (i.e., antiferromagnetic ordering) while the shell exhibits a disordered spin state. Thus, the nanorods show ferromagnetic properties and an exchange bias effect at the same time, increasing their potential for use in practical applications.
- OSTI ID:
- 22399025
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 106; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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