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Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility
Different studies carried out in the last three decades on the magnetic susceptibility of the spinel ZnFe(2)O(4) ferrite have revealed the positive character of its Curie–Weiss temperature, contradicting its observed antiferromagnetic behavior which is characterized by a well-defined susceptibility...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9317264/ https://www.ncbi.nlm.nih.gov/pubmed/35888256 http://dx.doi.org/10.3390/ma15144789 |
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author | Hernando, Antonio Cobos, Miguel Ángel Jiménez, José Antonio Llorente, Irene García-Escorial, Asunción de la Presa, Patricia |
author_facet | Hernando, Antonio Cobos, Miguel Ángel Jiménez, José Antonio Llorente, Irene García-Escorial, Asunción de la Presa, Patricia |
author_sort | Hernando, Antonio |
collection | PubMed |
description | Different studies carried out in the last three decades on the magnetic susceptibility of the spinel ZnFe(2)O(4) ferrite have revealed the positive character of its Curie–Weiss temperature, contradicting its observed antiferromagnetic behavior which is characterized by a well-defined susceptibility peak centered around the Neel temperature (10 K). Some approaches based on ab initio calculations and mixture of interactions have been attempted to explain this anomaly. This work shows how for very low values of the inversion parameter, the small percentage of Fe atoms located in tetrahedral sites gives rise to the appearance of ferrimagnetic clusters around them. Superparamagnetism of these clusters is the main cause of the anomalous Curie–Weiss behavior. This finding is supported experimentally from the thermal dependence of the inverse susceptibility and its evolution with the degree of inversion. |
format | Online Article Text |
id | pubmed-9317264 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93172642022-07-27 Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility Hernando, Antonio Cobos, Miguel Ángel Jiménez, José Antonio Llorente, Irene García-Escorial, Asunción de la Presa, Patricia Materials (Basel) Article Different studies carried out in the last three decades on the magnetic susceptibility of the spinel ZnFe(2)O(4) ferrite have revealed the positive character of its Curie–Weiss temperature, contradicting its observed antiferromagnetic behavior which is characterized by a well-defined susceptibility peak centered around the Neel temperature (10 K). Some approaches based on ab initio calculations and mixture of interactions have been attempted to explain this anomaly. This work shows how for very low values of the inversion parameter, the small percentage of Fe atoms located in tetrahedral sites gives rise to the appearance of ferrimagnetic clusters around them. Superparamagnetism of these clusters is the main cause of the anomalous Curie–Weiss behavior. This finding is supported experimentally from the thermal dependence of the inverse susceptibility and its evolution with the degree of inversion. MDPI 2022-07-08 /pmc/articles/PMC9317264/ /pubmed/35888256 http://dx.doi.org/10.3390/ma15144789 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Hernando, Antonio Cobos, Miguel Ángel Jiménez, José Antonio Llorente, Irene García-Escorial, Asunción de la Presa, Patricia Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title | Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title_full | Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title_fullStr | Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title_full_unstemmed | Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title_short | Ferrimagnetic Clusters as the Origin of Anomalous Curie–Weiss Behavior in ZnFe(2)O(4) Antiferromagnetic Susceptibility |
title_sort | ferrimagnetic clusters as the origin of anomalous curie–weiss behavior in znfe(2)o(4) antiferromagnetic susceptibility |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9317264/ https://www.ncbi.nlm.nih.gov/pubmed/35888256 http://dx.doi.org/10.3390/ma15144789 |
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