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Article Dans Une Revue Applied Physics Letters Année : 2010

Nonmagnetic Fe-site doping of BiFeO3 multiferroic ceramics

Résumé

In this paper, we show that a pure single phase by doping Fe-site of BiFeO3 (BFO) using tetravalent Zr4+ ions can be achieved by introducing cation (Bi3+) vacancies. The structural analysis reveals that the ferroelectric nature of BFO should be weakly affected by 10% of Zr4+ doping as the c/a ratio and the Curie temperature T-C remain roughly unchanged compared to that of pure BFO. In contrast, the magnetic properties are affected as a weak ferromagnetism and a change of Neel temperature T-N are observed. Beyond the double-exchange interactions arising from the creation of Fe2+, we propose another simple model inducing a local ferromagnetic coupling rather than an antiferromagnetic which considers the replacement of the magnetically active Fe3+, time to time, by a nonactive Zr4+.
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Dates et versions

hal-00583402 , version 1 (05-04-2011)

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J. Wei, R. Haumont, R. Jarrier, P. Berhtet, B. Dkhil. Nonmagnetic Fe-site doping of BiFeO3 multiferroic ceramics. Applied Physics Letters, 2010, 96 (10), pp.102509. ⟨10.1063/1.3327885⟩. ⟨hal-00583402⟩
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