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arXiv · 1901.08684

Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO3 on LaAlO3

Youngjun Ahn·Anastasios Pateras·Samuel D. Marks·Han Xu·Tao Zhou·Zhenlin Luo·Zuhuang Chen·Lang Chen·Xiaoyi Zhang·Anthony D. DiChiara·Haidan Wen·Paul G. Evans
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Abstract

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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Youngjun Ahn, Anastasios Pateras, Samuel D. Marks, Han Xu, Tao Zhou, Zhenlin Luo, Zuhuang Chen, Lang Chen, Xiaoyi Zhang, Anthony D. DiChiara, Haidan Wen, Paul G. Evans. 2019-10-08. Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO3 on LaAlO3. https://doi.org/10.1103/physrevlett.123.045703

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