Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment

We perform a theoretical and experimental investigation of the magnetic properties of a series of Mn-substituted non-stoichiometric cobalt ferrite nanopowders. We propose a theoretical approach based on the Stoner–Wohlfarth model of coherent rotation of single-domains, considering mean-field interac...

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Principais autores: Alves, Tibério Magno de Lima, Amorim, B. F., Medeiros, Suzana Nóbrega de, Bezerra, Claudionor Gomes
Formato: article
Idioma:English
Publicado em: IOP Publishing
Assuntos:
Non-stoichiometric
Nanopowders
Endereço do item:https://repositorio.ufrn.br/jspui/handle/123456789/29477
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spelling ri-123456789-294772022-10-14T17:30:42Z Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment Alves, Tibério Magno de Lima Amorim, B. F. Medeiros, Suzana Nóbrega de Bezerra, Claudionor Gomes Non-stoichiometric Nanopowders We perform a theoretical and experimental investigation of the magnetic properties of a series of Mn-substituted non-stoichiometric cobalt ferrite nanopowders. We propose a theoretical approach based on the Stoner–Wohlfarth model of coherent rotation of single-domains, considering mean-field interactions between the nanograins. In particular, we provide a detailed description of the magnetic anisotropy behavior, considering tetragonal distortions of the cubic spinel structure of the system. Our model shows that the effects of the tetragonal distortion of the cubic structure may be modeled by a superposition of uniaxial and cubic magnetocrystalline anisotropies. We obtain the uniaxial and cubic anisotropy constants and the mean-field parameters by fitting numerically the experimental magnetic hysteresis curves. Thus, the agreement between theory and experiment provides support to confirm the validity of our theoretical approach, in addition our results corroborate experimental works found in the literature reporting that cobalt ferrites present tetragonal distortion of the well-known cubic spinel structure 2020-07-07T14:11:12Z 2020-07-07T14:11:12Z 2017-01-25 article ALVES, T. M. L. ; AMORIM, B.F. ; MEDEIROS, S.N. ; Bezerra, C G . Magnetic anisotropy properties of Co1.2Fe1.8-xMnxO4 (0.0≤x≤0.3) nanopowders: theory and experiment. Journal of Physics D: Applied Physics, v. 50, p. 075003, 2017. Disponível em: http://iopscience.iop.org/article/10.1088/1361-6463/aa5612/meta. Acesso em: 07 jul. 2020.https://doi.org/10.1088/1361-6463/aa5612 0022-3727 https://repositorio.ufrn.br/jspui/handle/123456789/29477 10.1088/1361-6463/aa5612 en Attribution 3.0 Brazil IOP Publishing
institution Repositório Institucional
collection RI - UFRN
language English
topic Non-stoichiometric
Nanopowders
spellingShingle Non-stoichiometric
Nanopowders
Alves, Tibério Magno de Lima
Amorim, B. F.
Medeiros, Suzana Nóbrega de
Bezerra, Claudionor Gomes
Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
description We perform a theoretical and experimental investigation of the magnetic properties of a series of Mn-substituted non-stoichiometric cobalt ferrite nanopowders. We propose a theoretical approach based on the Stoner–Wohlfarth model of coherent rotation of single-domains, considering mean-field interactions between the nanograins. In particular, we provide a detailed description of the magnetic anisotropy behavior, considering tetragonal distortions of the cubic spinel structure of the system. Our model shows that the effects of the tetragonal distortion of the cubic structure may be modeled by a superposition of uniaxial and cubic magnetocrystalline anisotropies. We obtain the uniaxial and cubic anisotropy constants and the mean-field parameters by fitting numerically the experimental magnetic hysteresis curves. Thus, the agreement between theory and experiment provides support to confirm the validity of our theoretical approach, in addition our results corroborate experimental works found in the literature reporting that cobalt ferrites present tetragonal distortion of the well-known cubic spinel structure
format article
author Alves, Tibério Magno de Lima
Amorim, B. F.
Medeiros, Suzana Nóbrega de
Bezerra, Claudionor Gomes
author_facet Alves, Tibério Magno de Lima
Amorim, B. F.
Medeiros, Suzana Nóbrega de
Bezerra, Claudionor Gomes
author_sort Alves, Tibério Magno de Lima
title Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
title_short Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
title_full Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
title_fullStr Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
title_full_unstemmed Magnetic anisotropy properties of Co1.2Fe1.8–xMnxO4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
title_sort magnetic anisotropy properties of co1.2fe1.8–xmnxo4 (0.0 ≤ x ≤ 0.3) nanopowders: theory and experiment
publisher IOP Publishing
publishDate 2020
url https://repositorio.ufrn.br/jspui/handle/123456789/29477
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AT medeirossuzananobregade magneticanisotropypropertiesofco12fe18xmnxo400x03nanopowderstheoryandexperiment
AT bezerraclaudionorgomes magneticanisotropypropertiesofco12fe18xmnxo400x03nanopowderstheoryandexperiment
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