Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2

The nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller v...

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Principais autores: Araújo, José Humberto de, Cabral, F. A. O., Soares, João Medeiros, Machado, F. L. A.
Formato: article
Idioma:English
Publicado em: AIP Publishing
Assuntos:
Exchange-spring
Nanopowders
Endereço do item:https://repositorio.ufrn.br/jspui/handle/123456789/29313
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spelling ri-123456789-293132020-06-28T07:40:52Z Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2 Araújo, José Humberto de Cabral, F. A. O. Soares, João Medeiros Machado, F. L. A. Exchange-spring Nanopowders The nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller values of core diameters, the exchange-spring phenomenon takes place due to the exchange-coupling at the core-shell interface. The critical thickness of the shell was estimated to be 7.8 nm. The overall results are in excellent agreement with current theoretical models 2020-06-22T14:18:01Z 2020-06-22T14:18:01Z 2011-02-15 article SOARES, J.M.; CABRAL, F.A.O.; ARAÚJO, J. H.; MACHADO, F.L A.. Exchange-spring behavior in nanopowders of CoFe2O4?CoFe2. Applied Physics Letters, v. 98, p. 072502-1, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3552677 Acesso em: 18 jun 2020. https://doi.org/10.1063/1.3552677. 1077-3118 https://repositorio.ufrn.br/jspui/handle/123456789/29313 10.1063/1.3552677 en application/pdf AIP Publishing
institution Repositório Institucional
collection RI - UFRN
language English
topic Exchange-spring
Nanopowders
spellingShingle Exchange-spring
Nanopowders
Araújo, José Humberto de
Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
description The nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller values of core diameters, the exchange-spring phenomenon takes place due to the exchange-coupling at the core-shell interface. The critical thickness of the shell was estimated to be 7.8 nm. The overall results are in excellent agreement with current theoretical models
format article
author Araújo, José Humberto de
Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
author_facet Araújo, José Humberto de
Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
author_sort Araújo, José Humberto de
title Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_short Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_full Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_fullStr Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_full_unstemmed Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_sort exchange-spring behavior in nanopowders of cofe2o4–cofe2
publisher AIP Publishing
publishDate 2020
url https://repositorio.ufrn.br/jspui/handle/123456789/29313
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AT cabralfao exchangespringbehaviorinnanopowdersofcofe2o4cofe2
AT soaresjoaomedeiros exchangespringbehaviorinnanopowdersofcofe2o4cofe2
AT machadofla exchangespringbehaviorinnanopowdersofcofe2o4cofe2
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