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Real-time observation of phase coexistence and a(1)/a(2) to flux-closure domain transformation in ferroelectric films
Ma, J. Y.; Wang, Y. J.; Zhu, Y. L.; Tang, Y. L.; Han, M. J.; Zou, M. J.; Feng, Y. P.; Zhang, N. B.; Geng, W. R.; Wu, B.; Hu, W. T.; Guo, X. W.; Zhang, H.; Ma, X. L.
2020-07-01
Source PublicationACTA MATERIALIA
Volume193Pages:311-317
AbstractPhase coexistence in ferroelectric oxide films displays complex phase competitions and transformation which suggest new multiple-coupled properties. Here we have successfully engineered the coexistence of flux-closure and a(1)/a(2) phases in tensile-strained PbTiO3 films sandwiched between GdScO3 substrate and a SrTiO3 layer. Moreover, by using in-situ electron beam illumination, the unusual transformation from a(1)/a(2) phase to the flux-closure phase was directly observed. In detail, there are two types of transformations: One is the nucleation, growth, and expansion of the flux-closure phase from the internal region of the a(1)/a(2) phase. The other feature is a "dislocation gliding" like behavior: a thin lamella of a(1)/a(2) shrinks like "partial dislocation pairs" and finally the gradually disappeared a(1)/a(2) lamella forms a "perfect dislocation" in the flux-closure domain matrix. Phase-field simulations suggest that the a(1)/a(2) to flux-closure transition is induced by the decrease of the depolarization field, which is screened by the injected electrons from electron beam irradiation. These results directly confirm the phase interconversion under an external stimulus at the nanometer scale, which shed new light on the fabrication of new polar textures. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
DOI10.1016/j.actamat.2020.04.009
WOS IDWOS:000540707100029
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82736
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ma, J. Y.,Wang, Y. J.,Zhu, Y. L.,et al. Real-time observation of phase coexistence and a(1)/a(2) to flux-closure domain transformation in ferroelectric films[J]. ACTA MATERIALIA,2020,193:311-317.
APA Ma, J. Y..,Wang, Y. J..,Zhu, Y. L..,Tang, Y. L..,Han, M. J..,...&Ma, X. L..(2020).Real-time observation of phase coexistence and a(1)/a(2) to flux-closure domain transformation in ferroelectric films.ACTA MATERIALIA,193,311-317.
MLA Ma, J. Y.,et al."Real-time observation of phase coexistence and a(1)/a(2) to flux-closure domain transformation in ferroelectric films".ACTA MATERIALIA 193(2020):311-317.
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