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Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles

The magnetic properties of SrFe(12)O(19) (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 structur...

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Autores principales: Maltoni, Pierfrancesco, Ivanov, Sergey A., Barucca, Gianni, Varvaro, Gaspare, Peddis, Davide, Mathieu, Roland
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8639738/
https://www.ncbi.nlm.nih.gov/pubmed/34857873
http://dx.doi.org/10.1038/s41598-021-02782-2
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author Maltoni, Pierfrancesco
Ivanov, Sergey A.
Barucca, Gianni
Varvaro, Gaspare
Peddis, Davide
Mathieu, Roland
author_facet Maltoni, Pierfrancesco
Ivanov, Sergey A.
Barucca, Gianni
Varvaro, Gaspare
Peddis, Davide
Mathieu, Roland
author_sort Maltoni, Pierfrancesco
collection PubMed
description The magnetic properties of SrFe(12)O(19) (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.
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spelling pubmed-86397382021-12-06 Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles Maltoni, Pierfrancesco Ivanov, Sergey A. Barucca, Gianni Varvaro, Gaspare Peddis, Davide Mathieu, Roland Sci Rep Article The magnetic properties of SrFe(12)O(19) (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. Nature Publishing Group UK 2021-12-02 /pmc/articles/PMC8639738/ /pubmed/34857873 http://dx.doi.org/10.1038/s41598-021-02782-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Maltoni, Pierfrancesco
Ivanov, Sergey A.
Barucca, Gianni
Varvaro, Gaspare
Peddis, Davide
Mathieu, Roland
Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title_full Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title_fullStr Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title_full_unstemmed Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title_short Complex correlations between microstructure and magnetic behavior in SrFe(12)O(19) hexaferrite nanoparticles
title_sort complex correlations between microstructure and magnetic behavior in srfe(12)o(19) hexaferrite nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8639738/
https://www.ncbi.nlm.nih.gov/pubmed/34857873
http://dx.doi.org/10.1038/s41598-021-02782-2
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