Artículo
Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems
Winkler, Elin Lilian
; Lima, Enio Junior
; Tobia, Dina
; Saleta, Martin Eduardo
; Troiani, Horacio Esteban
; Agostinelli, Elisabetta; Fiorani, Dino; Zysler, Roberto Daniel
; Lima, Enio Junior
; Tobia, Dina
; Saleta, Martin Eduardo
; Troiani, Horacio Esteban
; Agostinelli, Elisabetta; Fiorani, Dino; Zysler, Roberto Daniel
Fecha de publicación:
12/2012
Editorial:
American Institute of Physics
Revista:
Applied Physics Letters
ISSN:
0003-6951
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
ZnO-core/CoFe2O4-shell nanoparticles of 7.4 nm average size have been synthesized and their magnetic properties have been compared to those of CoO-core/CoFe2O4-shell nanoparticles with similar morphology. The coercive field values are much lower than those for CoO/CoFe2O4 nanoparticles (e.g., at 5 K: Hc = 7.8 kOe for ZnO/CoFe2O4; Hc = 27.8 kOe for CoO/CoFe2O4). The nature of the coercive field values is explained by a phenomenological model for the free energy of a non-magnetic core, or an antiferromagnetic core, encapsulated by a hard ferrimagnetic shell.
Palabras clave:
core-shell
,
nanomagnetismo
,
TEM
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1.249Mb
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Licencia
Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción:
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
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Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Winkler, Elin Lilian; Lima, Enio Junior; Tobia, Dina; Saleta, Martin Eduardo; Troiani, Horacio Esteban; et al.; Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems; American Institute of Physics; Applied Physics Letters; 101; 25; 12-2012; 1-5
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