Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles.
Nanoscale Adv
; 3(24): 6912-6924, 2021 Dec 07.
Article
en En
| MEDLINE
| ID: mdl-36132365
ABSTRACT
The synthesis strategy and magnetic characterisation of two systems consisting of nanoparticles with core/shell morphology are presented an assembly of hard/soft nanoparticles with cores consisting of magnetically hard cobalt ferrite covered by a magnetically soft nickel ferrite shell, and the inverse system of almost the same size and shape. We have successfully designed these nanoparticle systems by gradually varying the magnetic anisotropy resulting in this way in the modulation of the magnetic dipolar interactions between particles. Both nanoparticle systems exhibit high saturation magnetisation and display superparamagnetic behaviour at room temperature. We have shown strong exchange coupling at the core/shell interface of these nanoparticles systems which was also confirmed by mesoscopic modelling. Our results demonstrate the possibility of modulating magnetic anisotropy not only by chemical composition but also by adopting the proper nano-architecture.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Nanoscale Adv
Año:
2021
Tipo del documento:
Article
Pais de publicación:
ENGLAND
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ESCOCIA
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GB
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GREAT BRITAIN
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INGLATERRA
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REINO UNIDO
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SCOTLAND
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UK
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UNITED KINGDOM