Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material

Abstract The five-layer Aurivillius phase Bi6TixFeyMnzO18 system is a rare example of a single-phase room temperature multiferroic material. To optimise its properties and exploit it for future memory storage applications, it is necessary to understand the origin of the room temperature magnetisatio...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Lynette Keeney, Clive Downing, Michael Schmidt, Martyn E. Pemble, Valeria Nicolosi, Roger W. Whatmore
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/08c0c9be9e004c43a291db9f8f937edf
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:08c0c9be9e004c43a291db9f8f937edf
record_format	dspace
spelling	oai:doaj.org-article:08c0c9be9e004c43a291db9f8f937edf2021-12-02T16:07:06ZDirect atomic scale determination of magnetic ion partition in a room temperature multiferroic material10.1038/s41598-017-01902-12045-2322https://doaj.org/article/08c0c9be9e004c43a291db9f8f937edf2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01902-1https://doaj.org/toc/2045-2322Abstract The five-layer Aurivillius phase Bi6TixFeyMnzO18 system is a rare example of a single-phase room temperature multiferroic material. To optimise its properties and exploit it for future memory storage applications, it is necessary to understand the origin of the room temperature magnetisation. In this work we use high resolution scanning transmission electron microscopy, EDX and EELS to discover how closely-packed Ti/Mn/Fe cations of similar atomic number are arranged, both within the perfect structure and within defect regions. Direct evidence for partitioning of the magnetic cations (Mn and Fe) to the central three of the five perovskite (PK) layers is presented, which reveals a marked preference for Mn to partition to the central layer. We infer this is most probably due to elastic strain energy considerations. The observed increase (>8%) in magnetic cation content at the central PK layers engenders up to a 90% increase in potential ferromagnetic spin alignments in the central layer and this could be significant in terms of creating pathways to the long-range room temperature magnetic order observed in this distinct and intriguing material system.Lynette KeeneyClive DowningMichael SchmidtMartyn E. PembleValeria NicolosiRoger W. WhatmoreNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lynette Keeney Clive Downing Michael Schmidt Martyn E. Pemble Valeria Nicolosi Roger W. Whatmore Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
description	Abstract The five-layer Aurivillius phase Bi6TixFeyMnzO18 system is a rare example of a single-phase room temperature multiferroic material. To optimise its properties and exploit it for future memory storage applications, it is necessary to understand the origin of the room temperature magnetisation. In this work we use high resolution scanning transmission electron microscopy, EDX and EELS to discover how closely-packed Ti/Mn/Fe cations of similar atomic number are arranged, both within the perfect structure and within defect regions. Direct evidence for partitioning of the magnetic cations (Mn and Fe) to the central three of the five perovskite (PK) layers is presented, which reveals a marked preference for Mn to partition to the central layer. We infer this is most probably due to elastic strain energy considerations. The observed increase (>8%) in magnetic cation content at the central PK layers engenders up to a 90% increase in potential ferromagnetic spin alignments in the central layer and this could be significant in terms of creating pathways to the long-range room temperature magnetic order observed in this distinct and intriguing material system.
format	article
author	Lynette Keeney Clive Downing Michael Schmidt Martyn E. Pemble Valeria Nicolosi Roger W. Whatmore
author_facet	Lynette Keeney Clive Downing Michael Schmidt Martyn E. Pemble Valeria Nicolosi Roger W. Whatmore
author_sort	Lynette Keeney
title	Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
title_short	Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
title_full	Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
title_fullStr	Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
title_full_unstemmed	Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
title_sort	direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/08c0c9be9e004c43a291db9f8f937edf
work_keys_str_mv	AT lynettekeeney directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial AT clivedowning directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial AT michaelschmidt directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial AT martynepemble directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial AT valerianicolosi directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial AT rogerwwhatmore directatomicscaledeterminationofmagneticionpartitioninaroomtemperaturemultiferroicmaterial
_version_	1718384698386808832

Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material

Ejemplares similares