Strain-driven phase transitions and associated dielectric/piezoelectric anomalies in BiFeO3 thin films

C. W. Huang, Ying-hao Chu, Z. H. Chen, Junling Wang, T. Sritharan, Q. He, R. Ramesh, Lang Chen

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Strain-driven phase transitions and related intrinsic polarization, dielectric, and piezoelectric properties for single-domain films were studied for BiFeO3 using phenomenological Landau-Devonshire theory. A stable and mixed structure between tetragonal and rhombohedral-like (monoclinic) phases is predicted at a compressive misfit strain of um =-0.0382 without an energy barrier. For a tensile misfit strain of um =0.0272, another phase transition between the monoclinic and orthorhombic phases was predicted with sharply high dielectric and piezoelectric responses.

Original languageEnglish
Article number152901
Pages (from-to)1049-1053
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number15
DOIs
StatePublished - 11 Oct 2010

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