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Title: Impact of core-shell dipolar interaction on magnetic phases of spherical core-shell nanoparticles
Authors: Carriço, Artur da Silva
Medeiros Filho, F. C.
Oliveira, L. L.
Pedrosa, S. S.
Rebouças, G. O. G.
Dantas, Ana L.
Keywords: Core-shell;Magnetic phases;Nanoparticles
Issue Date: 26-Aug-2015
Publisher: American Physical Society
Citation: MEDEIROS FILHO, F. C.; OLIVEIRA, L. L.; PEDROSA, S. S.; REBOUCAS, G. G. O.; DANTAS, Ana L.; CARRIÇO, Artur da Silva. Impact of core-shell dipolar interaction on magnetic phases of spherical core-shell nanoparticles. Physical Review. B, Condensed Matter and Materials Physics, v. 92, p. 0644221-0644227, 2015. ISSN 2469-9969 versão online. Disponível em: Acesso em: 08 abr. 2020.
Portuguese Abstract: We show that confinement in small volumes affects the interplay of exchange and dipolar interactions and the magnetic phases of hard and soft spherical core-shell nanoparticles. Large variations in the magnetization of thin shells may occur due to the core dipolar field gradient within the shell. The reversal field is tunable by the trends imposed by the dipolar and core-shell interface exchange energies. We show, for instance, that the reversal field of a CoFe2O4 (30 nm)@ MnFe 2O4 (6 nm) particle ranges from 15.5 kOe for antiferromagnetic coupling down to 2.5 kOe for ferromagnetic coupling.
ISSN: 2469-9950 (print), 2469-9969 (online)
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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