Domain tuning in mixed-phase BiFeO3 thin films using vicinal substrates

Lu You, Shintaro Yasui, Yoshitaka Ehara, Xi Zou, Hui Ding, Zuhuang Chen, Weigang Chen, Lang Chen, Hiroshi Funakubo, Junling Wang
2012 Applied Physics Letters  
The structural and ferroelectric domain variants of highly-strained BiFeO3 films grown on vicinal LaSrAlO4 substrates were studied by piezoelectric force microscopy and high-resolution X-ray reciprocal space mapping. Through symmetry breaking of the substrate surface, ferroelastic domain variants in the highly-strained MC phase BiFeO3 can be greatly reduced. Single-domain film can be obtained on substrates with large miscut angle, which is accompanied by the reduction of structural variants in
more » ... ctural variants in the mixed-phase nanodomains. These findings lead to better understanding of the phase evolution and polarization rotation process in the strain-driven morphotropic phase system.
doi:10.1063/1.4717986 fatcat:hmufxzjxojcx5foufmv6seu2xu