2026-07-25T15:52:03Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/720092026-04-22T12:44:08Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Hernando Grande, Antonio
author
Cobos Fernández, Miguel Ángel
author
Jiménez, José Antonio
author
Llorente, Irene
author
García Escorial, Asunción
author
Presa Muñoz De Toro, Patricia Marcela De La
2023-06-22T11:01:03Z
2023-06-22T11:01:03Z
2022-07-08
1996-1944
10.3390/ma15144789
https://hdl.handle.net/20.500.14352/72009
http://dx.doi.org/10.3390/ma15144789
Different studies carried out in the last three decades on the magnetic susceptibility of the spinel ZnFe_2O_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.
eng
Atribución 3.0 España
Ferrimagnetic clusters as the origin of anomalous Curie-Weiss behavior in ZnFe_2O_4 antiferromagnetic susceptibility
journal article
URL
https://docta.ucm.es/bitstreams/3fa9f6ff-c22c-436a-8fe8-9447dabdf086/download
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3dafb411354a6b9d52dc219978d299b3
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application/pdf
DeLaPresaP 28 OA+CC.pdf
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a248607d7d47452265eb1b17cc82deac
33571
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DeLaPresaP 28 OA+CC.pdf.txt