Effects of anisotropic misfit strains on equilibrium phases and domain structures in (111)-oriented ferroelectric PbTiO3 films

doi:10.1016/j.actamat.2021.116639

CORC > 兰州理工大学 > 兰州理工大学

	Effects of anisotropic misfit strains on equilibrium phases and domain structures in (111)-oriented ferroelectric PbTiO3 films
	Guo, X. W.2,3; Zou, M. J.2,3; Wang, Y. J.2; Tang, Y. L.2; Zhu, Y. L.2; Ma, X. L.1,2
刊名	ACTA MATERIALIA
	2021
卷号	206
关键词	Phase-field simulations Domain stability diagram (111)-oriented Anisotropic misfit strains
ISSN号	1359-6454
DOI	10.1016/j.actamat.2021.116639
英文摘要	Advances in high-index-oriented ferroelectric films offer the exciting possibility of utilizing strain engineering to tune the desired properties related to the nanostructures. Previous studies often considered ferroelectric films grown on cubic substrates (isotropic strain), while the effects of anisotropic strains introduced by orthorhombic substrates are still not well understood. In our recent work, we grew (111)-oriented PbTiO3 (PTO) films on orthorhombic GdScO3 substrates and studied the domain structure evolution with film thickness. However, the theoretical understanding is lacking. In this work, the physical mechanism of the formation and evolution of domain structures was clearly revealed from the viewpoint of energy competition. Moreover, through the stereographic projection (SP) analysis of polarization vectors, a wide variety of ferroelectric phases for (111)-oriented PTO films under anisotropic strains were identified, and the misfit strain-misfit strain domain stability diagram was then constructed at room temperature. It was indicated that anisotropic misfit strains not only lead to the separation of ferroelectric domain variants that could co-exist under isotropic strain states for tetragonal-like d and monoclinic ma phases, but also stabilize the monoclinic mb phase. Their representative domain morphologies with separated domain variants under different anisotropic strains were analyzed in detail. These results provide guidance for interpreting and understanding more experimental data as well as the designing of (111)-oriented epitaxial ferroelectrics under anisotropic strains. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000620252300052
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147449]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730050, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China; 3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China;
推荐引用方式 GB/T 7714	Guo, X. W.,Zou, M. J.,Wang, Y. J.,et al. Effects of anisotropic misfit strains on equilibrium phases and domain structures in (111)-oriented ferroelectric PbTiO3 films[J]. ACTA MATERIALIA,2021,206.
APA	Guo, X. W.,Zou, M. J.,Wang, Y. J.,Tang, Y. L.,Zhu, Y. L.,&Ma, X. L..(2021).Effects of anisotropic misfit strains on equilibrium phases and domain structures in (111)-oriented ferroelectric PbTiO3 films.ACTA MATERIALIA,206.
MLA	Guo, X. W.,et al."Effects of anisotropic misfit strains on equilibrium phases and domain structures in (111)-oriented ferroelectric PbTiO3 films".ACTA MATERIALIA 206(2021).