Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering

Abstract Perovskite oxides are known for their strong structure property coupling and functional properties such as ferromagntism, ferroelectricity and high temperature superconductivity. While the effect of ordered cation vacancies on functional properties have been much studied, the possibility of...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Magnus Moreau, Sverre M. Selbach, Thomas Tybell
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7b9abf130f1842e7b7e33dc49cd34f0f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7b9abf130f1842e7b7e33dc49cd34f0f
record_format	dspace
spelling	oai:doaj.org-article:7b9abf130f1842e7b7e33dc49cd34f0f2021-12-02T12:30:52ZSpatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering10.1038/s41598-017-04103-y2045-2322https://doaj.org/article/7b9abf130f1842e7b7e33dc49cd34f0f2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04103-yhttps://doaj.org/toc/2045-2322Abstract Perovskite oxides are known for their strong structure property coupling and functional properties such as ferromagntism, ferroelectricity and high temperature superconductivity. While the effect of ordered cation vacancies on functional properties have been much studied, the possibility of tuning the functionality through anion vacancy ordering has received much less attention. Oxygen vacancies in ferromagnetic La0.7Sr0.3MnO3−δ thin films have recently been shown to accumulate close to interfaces and form a brownmillerite structure (ABO2.5). This structure has alternating oxygen octahedral and tetrahedral layers along the stacking direction, making it a basis for a family of ordered anion defect controlled materials. We use density functional theory to study how structure and properties depend on oxygen stoichiometry, relying on a block-by-block approach by including additional octahedral layers in-between each tetrahedral layer. It is found that the magnetic and electronic structures follow the layers enforced by the ordered oxygen vacancies. This results in spatially confined electronic conduction in the octahedral layers, and decoupling of the magnetic sub-lattices in the octahedral and tetrahedral layers. These results demonstrate that anion defect engineering is a promising tool to tune the properties of functional oxides, adding a new avenue for developing functional oxide device technology.Magnus MoreauSverre M. SelbachThomas TybellNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Magnus Moreau Sverre M. Selbach Thomas Tybell Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
description	Abstract Perovskite oxides are known for their strong structure property coupling and functional properties such as ferromagntism, ferroelectricity and high temperature superconductivity. While the effect of ordered cation vacancies on functional properties have been much studied, the possibility of tuning the functionality through anion vacancy ordering has received much less attention. Oxygen vacancies in ferromagnetic La0.7Sr0.3MnO3−δ thin films have recently been shown to accumulate close to interfaces and form a brownmillerite structure (ABO2.5). This structure has alternating oxygen octahedral and tetrahedral layers along the stacking direction, making it a basis for a family of ordered anion defect controlled materials. We use density functional theory to study how structure and properties depend on oxygen stoichiometry, relying on a block-by-block approach by including additional octahedral layers in-between each tetrahedral layer. It is found that the magnetic and electronic structures follow the layers enforced by the ordered oxygen vacancies. This results in spatially confined electronic conduction in the octahedral layers, and decoupling of the magnetic sub-lattices in the octahedral and tetrahedral layers. These results demonstrate that anion defect engineering is a promising tool to tune the properties of functional oxides, adding a new avenue for developing functional oxide device technology.
format	article
author	Magnus Moreau Sverre M. Selbach Thomas Tybell
author_facet	Magnus Moreau Sverre M. Selbach Thomas Tybell
author_sort	Magnus Moreau
title	Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
title_short	Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
title_full	Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
title_fullStr	Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
title_full_unstemmed	Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
title_sort	spatially confined spin polarization and magnetic sublattice control in (la,sr)mno3−δ thin films by oxygen vacancy ordering
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7b9abf130f1842e7b7e33dc49cd34f0f
work_keys_str_mv	AT magnusmoreau spatiallyconfinedspinpolarizationandmagneticsublatticecontrolinlasrmno3dthinfilmsbyoxygenvacancyordering AT sverremselbach spatiallyconfinedspinpolarizationandmagneticsublatticecontrolinlasrmno3dthinfilmsbyoxygenvacancyordering AT thomastybell spatiallyconfinedspinpolarizationandmagneticsublatticecontrolinlasrmno3dthinfilmsbyoxygenvacancyordering
_version_	1718394286998814720

Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering

Ejemplares similares