Wasp-waisted behavior in magnetic hysteresis curves of CoFe2O4 nanopowder at a low temperature: experimental evidence and theoretical approach

Alves, Tibério Magno de Lima; Amorim, Bruno Ferreira; Torres, Marco Antonio Morales; Bezerra, Claudinor Gomes; Medeiros, Suzana Nóbrega de; Gastelois, Pedro Lana; Outon, Luís Eugênio Fernandez; Macedo, Waldemar Augusto de Almeida

Wasp-waisted behavior in magnetic hysteresis curves of CoFe2O4 nanopowder at a low temperature: experimental evidence and theoretical approach

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dc.contributor.author	Alves, Tibério Magno de Lima
dc.contributor.author	Amorim, Bruno Ferreira
dc.contributor.author	Torres, Marco Antonio Morales
dc.contributor.author	Bezerra, Claudinor Gomes
dc.contributor.author	Medeiros, Suzana Nóbrega de
dc.contributor.author	Gastelois, Pedro Lana
dc.contributor.author	Outon, Luís Eugênio Fernandez
dc.contributor.author	Macedo, Waldemar Augusto de Almeida
dc.date.accessioned	2020-07-08T21:04:21Z
dc.date.available	2020-07-08T21:04:21Z
dc.date.issued	2017-04-20
dc.description.resumo	We theoretically and experimentally investigated wasp-waisted magnetic hysteresis curves at a low temperature for CoFe2O4 nanopowders. Our theoretical approach proposes a physical mechanism that leads to wasp-waisted behavior for a single magnetic phase with the same anisotropic field, contrary to that of typical multi-phase magnetic systems. Our simulations show that a combination of effects, namely easy-plane anisotropy configuration and dipolar interactions, results in a double peak in the magnetic susceptibility curve of a granular magnetic system. As experimental evidence of such an effect, we present a CoFe2O4 nanopowder and its structural and magnetic characterizations, which support a single magnetic phase. In addition, the evidence does not corroborate many explanations reported in the literature for wasp-waisted magnetic behavior. Our results provide evidence for a tetragonal crystalline phase of CoFe2O4 due to magneto-elastic coupling, recently reported in the literature	pt_BR
dc.identifier.citation	ALVES, T.M.L.; AMORIM, B. F.; TORRES, M. A. M.; BEZERRA, C. G.; MEDEIROS, S. N. M.; GASTELOIS, P. L.; OUTON, L. E. F.; MACEDO, W. A. A.. Wasp-waisted behavior in magnetic hysteresis curves of CoFe 2 O 4nanopowder at a low temperature: experimental evidence and theoretical approach. RSC Advances, v. 7, p. 22187-22196, 2017. Disponível em: http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C6RA28727A#!divAbstract. Acesso em: 06 jul. 2020.	pt_BR
dc.identifier.doi	10.1039/C6RA28727A
dc.identifier.issn	2046-2069
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29506
dc.language	en	pt_BR
dc.publisher	Royal Society of Chemistry	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Nanopowders	pt_BR
dc.subject	Easy-plane anisotropy	pt_BR
dc.title	Wasp-waisted behavior in magnetic hysteresis curves of CoFe2O4 nanopowder at a low temperature: experimental evidence and theoretical approach	pt_BR
dc.type	article	pt_BR