Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering

Abstract Scientific efforts are growing to understand artificial BiFeO3/SrRuO3/SrTiO3-heterostructures, wherein an altered environment at each interface, caused by epitaxial strains, broken symmetry, off-stoichiometry and charge transfer, can generate a rich spectrum of exotic properties. Herein, (B...

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Autores principales:	Murtaza Bohra, Kartikeya Negi, Varun Karthik Y. S., Hsiung Chou, X. Wang, W. K. Chu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/91817f3a0d1f47918c7192ca7f080367
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spelling	oai:doaj.org-article:91817f3a0d1f47918c7192ca7f0803672021-12-02T15:06:15ZOrigin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering10.1038/s41598-017-04543-62045-2322https://doaj.org/article/91817f3a0d1f47918c7192ca7f0803672017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04543-6https://doaj.org/toc/2045-2322Abstract Scientific efforts are growing to understand artificial BiFeO3/SrRuO3/SrTiO3-heterostructures, wherein an altered environment at each interface, caused by epitaxial strains, broken symmetry, off-stoichiometry and charge transfer, can generate a rich spectrum of exotic properties. Herein, (BiPb)FeO3/SrRuO3/SrTiO3-heterostructures were sputtered with various top (BiPb)FeO3-layers at different growth temperatures (T g). Strain relaxation at each interface changes with T g and generates an additional peak alongside with (BiPb)FeO3 at a high T g of 700 °C. Rutherford backscattering (RBS) was employed to understand this unusual behavior as to whether it is a mixture of two phases, layer splitting or inter-diffusion of elements. Surprisingly, complete overlapping of random and aligned RBS spectra from the sample with T g = 700 °C indicates the presence of a large amount of defects/distortions at the interfaces. The RBS compositional analysis gives clear evidence of Fe and Ru vacancies to an extent that the structural integrity may not be maintained. This abnormal condition can be explained by the inter-diffusion of Pb and Bi elements into whole films and even into the top layer of the SrTiO3 substrate, which compensates for these vacancies by substitutional replacement and is responsible for the generation of the additional SrTi(BiPb)O3—peak. Below T c SrRuO 3, the magnetic properties change significantly with T g .Murtaza BohraKartikeya NegiVarun Karthik Y. S.Hsiung ChouX. WangW. K. ChuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Murtaza Bohra Kartikeya Negi Varun Karthik Y. S. Hsiung Chou X. Wang W. K. Chu Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
description	Abstract Scientific efforts are growing to understand artificial BiFeO3/SrRuO3/SrTiO3-heterostructures, wherein an altered environment at each interface, caused by epitaxial strains, broken symmetry, off-stoichiometry and charge transfer, can generate a rich spectrum of exotic properties. Herein, (BiPb)FeO3/SrRuO3/SrTiO3-heterostructures were sputtered with various top (BiPb)FeO3-layers at different growth temperatures (T g). Strain relaxation at each interface changes with T g and generates an additional peak alongside with (BiPb)FeO3 at a high T g of 700 °C. Rutherford backscattering (RBS) was employed to understand this unusual behavior as to whether it is a mixture of two phases, layer splitting or inter-diffusion of elements. Surprisingly, complete overlapping of random and aligned RBS spectra from the sample with T g = 700 °C indicates the presence of a large amount of defects/distortions at the interfaces. The RBS compositional analysis gives clear evidence of Fe and Ru vacancies to an extent that the structural integrity may not be maintained. This abnormal condition can be explained by the inter-diffusion of Pb and Bi elements into whole films and even into the top layer of the SrTiO3 substrate, which compensates for these vacancies by substitutional replacement and is responsible for the generation of the additional SrTi(BiPb)O3—peak. Below T c SrRuO 3, the magnetic properties change significantly with T g .
format	article
author	Murtaza Bohra Kartikeya Negi Varun Karthik Y. S. Hsiung Chou X. Wang W. K. Chu
author_facet	Murtaza Bohra Kartikeya Negi Varun Karthik Y. S. Hsiung Chou X. Wang W. K. Chu
author_sort	Murtaza Bohra
title	Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
title_short	Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
title_full	Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
title_fullStr	Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
title_full_unstemmed	Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering
title_sort	origin of abnormal structural transformation in a (bipb)feo3/srruo3/srtio3 hetero-structure probed by rutherford backscattering
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/91817f3a0d1f47918c7192ca7f080367
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Origin of abnormal structural transformation in a (BiPb)FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering

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