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Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO3 on LaAlO3

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arxiv 1901.08684 v3 pith:WV66JQHZ submitted 2019-01-24 cond-mat.mes-hall

Youngjun Ahn , Anastasios Pateras , Samuel D. Marks , Han Xu , Tao Zhou , Zhenlin Luo , Zuhuang Chen , Lang Chen
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Xiaoyi Zhang Anthony D. DiChiara Haidan Wen Paul G. Evans
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classification cond-mat.mes-hall
keywords t-likephasetransformationopticallytiltedbifeo3compressivelyinduced
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Above-bandgap optical illumination induces a transformation from tilted tetragonal-like (T-like) and rhombohedral-like (R-like) phases to an untilted T-like phase in compressively strained BiFeO3. Optical excitation leads to an out-of-plane lattice expansion in the T-like phase. The transformation proceeds in regions with boundaries between the T-like and tilted R-like and tilted T-like phases, consistent with the motion of a boundary. The optically induced transformation indicates that there are new optically driven routes towards nanosecond-scale control of phase transformations in ferroelectrics and multiferroics.

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