Real-time observation of phase coexistence and a1/a2 to flux-closure domain transformation in ferroelectric films

doi:10.1016/j.actamat.2020.04.009

	Real-time observation of phase coexistence and a1/a2 to flux-closure domain transformation in ferroelectric films
	Ma, J.Y.1,4,5; Wang, Y.J.1; Zhu, Y.L.1; Tang, Y.L.1; Han, M.J.1,2,3; Zou, M.J.1,4; Feng, Y.P.1,3; Zhang, N.B.1,4; Geng, W.R.1,4; Wu, B.1,4
刊名	Acta Materialia
	2020-07-01
卷号	193 页码:311-317
关键词	Electron beams Ferroelectric films Ferroelectricity Gadolinium compounds Lead titanate Strontium titanates Textures Titanium compounds Depolarization fields Electron beam irradiation Ferroelectric oxides Injected electrons Partial dislocations Phase co-existence Phase-field simulation Real time observation
ISSN号	13596454
DOI	10.1016/j.actamat.2020.04.009
英文摘要	Phase 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 a1/a2 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 a1/a2 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 a1/a2 phase. The other feature is a "dislocation gliding" like behavior: a thin lamella of a1/a2 shrinks like "partial dislocation pairs" and finally the gradually disappeared a1/a2 lamella forms a "perfect dislocation" in the flux-closure domain matrix. Phase-field simulations suggest that the a1/a2 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. © 2020 Acta Materialia Inc.
语种	英语
出版者	Acta Materialia Inc
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115759]
专题	材料科学与工程学院
作者单位	1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, Shenyang; 110016, China; 2.Department of Physics, Southern University of Science & Technology, Shenzhen; 518055, China 3.University of Chinese Academy of Sciences, Yuquan Road 19, Beijing; 100049, China; 4.State Key Laboratory of Advanced Processing and Recycling on Non-ferrous Metals, Lanzhou University of Technology, Langongping Road 287, Lanzhou; 730050, China; 5.School of Material Science and Engineering, University of Science and Technology of China, Jinzhai Road 96, Hefei; 230026, China;
推荐引用方式 GB/T 7714	Ma, J.Y.,Wang, Y.J.,Zhu, Y.L.,et al. Real-time observation of phase coexistence and a1/a2 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 a1/a2 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 a1/a2 to flux-closure domain transformation in ferroelectric films".Acta Materialia 193(2020):311-317.