A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression

In BaTiO3 single crystals, we observed a strain-driven phase transition from the tetragonal phase to the tetragonal-orthorhombic phase boundary which can be introduced by slow cycling compressions (a loading of up to 0.5 GPa, strain rate of 10−4 s−1, and 100 cycles) at room temperature. Different fr...

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Autores principales:	Yifeng Ren, Jiayi Li, Yunlei Zhao, Jim Ciston, Karen Bustillo, Ruopeng Zhang, Hongliang Dong, Zhiqiang Chen, Andrew M. Minor, Yu Deng
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/87058c9da5d74b1686855ffad0dd87d5
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id	oai:doaj.org-article:87058c9da5d74b1686855ffad0dd87d5
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spelling	oai:doaj.org-article:87058c9da5d74b1686855ffad0dd87d52021-12-01T18:52:06ZA strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression2158-322610.1063/5.0066660https://doaj.org/article/87058c9da5d74b1686855ffad0dd87d52021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0066660https://doaj.org/toc/2158-3226In BaTiO3 single crystals, we observed a strain-driven phase transition from the tetragonal phase to the tetragonal-orthorhombic phase boundary which can be introduced by slow cycling compressions (a loading of up to 0.5 GPa, strain rate of 10−4 s−1, and 100 cycles) at room temperature. Different from the well-known tetragonal to cubic phase transition under stress (∼2 GPa), it only takes place locally around bent 90° domain walls. The inhomogeneous local stress and electrical fields as well as the mobile point defect pinning effect contribute to the phase re-entrance. Through comparison experiments by in situ synchrotron x-ray diffraction, Raman scattering, and (scanning) transmission electron microscopy, we explored the phase transition mechanism. Based on that, we developed a mechanical method to obtain well-stabilized high-density thermotropic phase boundary structures (with tetragonal, orthorhombic, and bridging monoclinic phases) in BaTiO3 for potential applications.Yifeng RenJiayi LiYunlei ZhaoJim CistonKaren BustilloRuopeng ZhangHongliang DongZhiqiang ChenAndrew M. MinorYu DengAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115122-115122-5 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Yifeng Ren Jiayi Li Yunlei Zhao Jim Ciston Karen Bustillo Ruopeng Zhang Hongliang Dong Zhiqiang Chen Andrew M. Minor Yu Deng A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
description	In BaTiO3 single crystals, we observed a strain-driven phase transition from the tetragonal phase to the tetragonal-orthorhombic phase boundary which can be introduced by slow cycling compressions (a loading of up to 0.5 GPa, strain rate of 10−4 s−1, and 100 cycles) at room temperature. Different from the well-known tetragonal to cubic phase transition under stress (∼2 GPa), it only takes place locally around bent 90° domain walls. The inhomogeneous local stress and electrical fields as well as the mobile point defect pinning effect contribute to the phase re-entrance. Through comparison experiments by in situ synchrotron x-ray diffraction, Raman scattering, and (scanning) transmission electron microscopy, we explored the phase transition mechanism. Based on that, we developed a mechanical method to obtain well-stabilized high-density thermotropic phase boundary structures (with tetragonal, orthorhombic, and bridging monoclinic phases) in BaTiO3 for potential applications.
format	article
author	Yifeng Ren Jiayi Li Yunlei Zhao Jim Ciston Karen Bustillo Ruopeng Zhang Hongliang Dong Zhiqiang Chen Andrew M. Minor Yu Deng
author_facet	Yifeng Ren Jiayi Li Yunlei Zhao Jim Ciston Karen Bustillo Ruopeng Zhang Hongliang Dong Zhiqiang Chen Andrew M. Minor Yu Deng
author_sort	Yifeng Ren
title	A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
title_short	A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
title_full	A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
title_fullStr	A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
title_full_unstemmed	A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression
title_sort	strain-driven thermotropic phase boundary in batio3 at room temperature by cycling compression
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/87058c9da5d74b1686855ffad0dd87d5
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A strain-driven thermotropic phase boundary in BaTiO3 at room temperature by cycling compression

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