Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3 - Archive ouverte HAL
Article Dans Une Revue Physical Review Letters Année : 2010

Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3

Résumé

We report the influence of epitaxial strain on the multiferroic phase transitions of BiFeO3 films. Using advanced characterization techniques and calculations we show that while the magnetic Ne'el temperature hardly varies, the ferroelectric Curie temperature TC decreases dramatically with strain. This is in contrast with the behavior of standard ferroelectrics where strain enhances the polar cation shifts and thus TC. We argue that this is caused by an interplay of polar and oxygen tilting instabilities and that strain can drive both transitions close together to yield increased magnetoelectric responses.
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Dates et versions

hal-00582402 , version 1 (01-04-2011)

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Ingrid C.Infante, S. Lisenkov, B. Dupé, M. Bibes, S. Fusil, et al.. Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3. Physical Review Letters, 2010, 105, pp.057601. ⟨10.1103/PhysRevLett.105.057601⟩. ⟨hal-00582402⟩
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