Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles

Abstract The magnetic properties of SrFe12O19 (SFO) hard hexaferrites are governed by the complex relation to its microstructure, determining their relevance for permanent magnets´ applications. A set of SFO nanoparticles obtained by sol–gel self-combustion synthesis was selected for an in-depth str...

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Autores principales:	Pierfrancesco Maltoni, Sergey A. Ivanov, Gianni Barucca, Gaspare Varvaro, Davide Peddis, Roland Mathieu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4fea885ad58343189f4f79e8fc60cfab
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spelling	oai:doaj.org-article:4fea885ad58343189f4f79e8fc60cfab2021-12-05T12:12:56ZComplex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles10.1038/s41598-021-02782-22045-2322https://doaj.org/article/4fea885ad58343189f4f79e8fc60cfab2021-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02782-2https://doaj.org/toc/2045-2322Abstract The magnetic properties of SrFe12O19 (SFO) hard hexaferrites are governed by the complex relation to its microstructure, determining their relevance for permanent magnets´ applications. A set of SFO nanoparticles obtained by sol–gel self-combustion synthesis was selected for an in-depth structural X-Rays powder diffraction (XRPD) characterization by means of G(L) line-profile analysis. The obtained crystallites´ size distribution reveal a clear dependence of the size along the [001] direction on the synthesis approach, resulting in the formation of platelet-like crystallites. In addition, the size of the SFO nanoparticles was determined by transmission electron microscopy (TEM) analysis and the average number of crystallites within a particle was estimated. These results have been evaluated to illustrate the formation of single-domain state below a critical value, and the activation volume was derived from time dependent magnetization measurements, aiming to clarify the reversal magnetization process of hard magnetic materials.Pierfrancesco MaltoniSergey A. IvanovGianni BaruccaGaspare VarvaroDavide PeddisRoland MathieuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Pierfrancesco Maltoni Sergey A. Ivanov Gianni Barucca Gaspare Varvaro Davide Peddis Roland Mathieu Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
description	Abstract The magnetic properties of SrFe12O19 (SFO) hard hexaferrites are governed by the complex relation to its microstructure, determining their relevance for permanent magnets´ applications. A set of SFO nanoparticles obtained by sol–gel self-combustion synthesis was selected for an in-depth structural X-Rays powder diffraction (XRPD) characterization by means of G(L) line-profile analysis. The obtained crystallites´ size distribution reveal a clear dependence of the size along the [001] direction on the synthesis approach, resulting in the formation of platelet-like crystallites. In addition, the size of the SFO nanoparticles was determined by transmission electron microscopy (TEM) analysis and the average number of crystallites within a particle was estimated. These results have been evaluated to illustrate the formation of single-domain state below a critical value, and the activation volume was derived from time dependent magnetization measurements, aiming to clarify the reversal magnetization process of hard magnetic materials.
format	article
author	Pierfrancesco Maltoni Sergey A. Ivanov Gianni Barucca Gaspare Varvaro Davide Peddis Roland Mathieu
author_facet	Pierfrancesco Maltoni Sergey A. Ivanov Gianni Barucca Gaspare Varvaro Davide Peddis Roland Mathieu
author_sort	Pierfrancesco Maltoni
title	Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
title_short	Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
title_full	Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
title_fullStr	Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
title_full_unstemmed	Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles
title_sort	complex correlations between microstructure and magnetic behavior in srfe12o19 hexaferrite nanoparticles
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4fea885ad58343189f4f79e8fc60cfab
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_version_	1718372131205545984

Complex correlations between microstructure and magnetic behavior in SrFe12O19 hexaferrite nanoparticles

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