Low symmetry phase in (001) BiFeO3 epitaxial constrained thin films

Guangyong Xu; Hiraka, H.; Shirane, G.; Jiefang Li; Junling Wang; Viehland, D.
May 2005
Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p182905
Academic Journal
The lattice of (001)-oriented BiFeO3 epitaxial thin film has been identified by synchrotron x-ray diffraction. By choosing proper scattering zones containing the fixed (001) reflection, we have shown that low-symmetry phases similar to a MA phase exist in the thin film at room temperature. These results demonstrate a change in phase stability from rhombohedral in bulk single crystals, to a modified monoclinic structure in epitaxial thin films.


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