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Title

Evidence for a first-order transition from monoclinic α to monoclinic β phase in BiFeO3 thin films

Authors
Toupet, H.
Dkhil, B.
Karkut, M. G.
Published in Physical Review. B, Condensed Matter. 2010, vol. 81, no. 14
Abstract We report a temperature-dependent high-resolution x-ray diffraction investigation of 200-nm epitaxial BiFeO3 thin films grown on (001) SrTiO3. We find that BiFeO3 undergoes two high-temperature transitions: a first-order α−β phase transition between 745 and 780 °C and a more diffuse transition toward the γ phase at 860 °C. Reciprocal space maps reveal that thin films remain monoclinic crossing the α−β phase transition. Linear extrapolation of the in-plane lattice parameters to higher temperatures appears to rule out cubic symmetry for the γ phase.
Keywords Epitaxial thin filmsBiFeO3X-ray diffractionPhase transition
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Research group Groupe Triscone
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TOUPET, H. et al. Evidence for a first-order transition from monoclinic α to monoclinic β phase in BiFeO3 thin films. In: Physical Review. B, Condensed Matter, 2010, vol. 81, n° 14. https://archive-ouverte.unige.ch/unige:114934

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Deposited on : 2019-03-12

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