Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells

Bi-magnetic core/shell nanoparticles were synthesized by a two-step high-temperature decomposition method of metal acetylacetonate salts. Transmission electron microscopy confirmed the formation of an ultrathin shell (~0.6 nm) of NiO and NiFe<sub>2</sub>O<sub>4</sub> around t...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Alexander Omelyanchik, Silvia Villa, Gurvinder Singh, Valeria Rodionova, Sara Laureti, Fabio Canepa, Davide Peddis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	magnetic nanoparticles exchange-coupling magnetic volume CoFe<sub>2</sub>O<sub>4</sub> NiFe<sub>2</sub>O<sub>4</sub> NiO Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/2700256d8db74311ae897be4b453e1f9
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2700256d8db74311ae897be4b453e1f9
record_format	dspace
spelling	oai:doaj.org-article:2700256d8db74311ae897be4b453e1f92021-11-25T18:12:31ZMagnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells10.3390/magnetochemistry71101462312-7481https://doaj.org/article/2700256d8db74311ae897be4b453e1f92021-11-01T00:00:00Zhttps://www.mdpi.com/2312-7481/7/11/146https://doaj.org/toc/2312-7481Bi-magnetic core/shell nanoparticles were synthesized by a two-step high-temperature decomposition method of metal acetylacetonate salts. Transmission electron microscopy confirmed the formation of an ultrathin shell (~0.6 nm) of NiO and NiFe<sub>2</sub>O<sub>4</sub> around the magnetically hard 8 nm CoFe<sub>2</sub>O<sub>4</sub> core nanoparticle. Magnetization measurements showed an increase in the coercivity of the single-phase CoFe<sub>2</sub>O<sub>4</sub> seed nanoparticles from ~1.2 T to ~1.5 T and to ~2.0 T for CoFe<sub>2</sub>O<sub>4</sub>/NiFe<sub>2</sub>O<sub>4</sub> and CoFe<sub>2</sub>O<sub>4</sub>/NiO, respectively. The NiFe<sub>2</sub>O<sub>4</sub> shell also increases the magnetic volume of particles and the dipolar interparticle interactions. In contrast, the NiO shell prevents such interactions and keeps the magnetic volume almost unchanged.Alexander OmelyanchikSilvia VillaGurvinder SinghValeria RodionovaSara LauretiFabio CanepaDavide PeddisMDPI AGarticlemagnetic nanoparticlesexchange-couplingmagnetic volumeCoFe<sub>2</sub>O<sub>4</sub>NiFe<sub>2</sub>O<sub>4</sub>NiOChemistryQD1-999ENMagnetochemistry, Vol 7, Iss 146, p 146 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	magnetic nanoparticles exchange-coupling magnetic volume CoFe<sub>2</sub>O<sub>4</sub> NiFe<sub>2</sub>O<sub>4</sub> NiO Chemistry QD1-999
spellingShingle	magnetic nanoparticles exchange-coupling magnetic volume CoFe<sub>2</sub>O<sub>4</sub> NiFe<sub>2</sub>O<sub>4</sub> NiO Chemistry QD1-999 Alexander Omelyanchik Silvia Villa Gurvinder Singh Valeria Rodionova Sara Laureti Fabio Canepa Davide Peddis Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
description	Bi-magnetic core/shell nanoparticles were synthesized by a two-step high-temperature decomposition method of metal acetylacetonate salts. Transmission electron microscopy confirmed the formation of an ultrathin shell (~0.6 nm) of NiO and NiFe<sub>2</sub>O<sub>4</sub> around the magnetically hard 8 nm CoFe<sub>2</sub>O<sub>4</sub> core nanoparticle. Magnetization measurements showed an increase in the coercivity of the single-phase CoFe<sub>2</sub>O<sub>4</sub> seed nanoparticles from ~1.2 T to ~1.5 T and to ~2.0 T for CoFe<sub>2</sub>O<sub>4</sub>/NiFe<sub>2</sub>O<sub>4</sub> and CoFe<sub>2</sub>O<sub>4</sub>/NiO, respectively. The NiFe<sub>2</sub>O<sub>4</sub> shell also increases the magnetic volume of particles and the dipolar interparticle interactions. In contrast, the NiO shell prevents such interactions and keeps the magnetic volume almost unchanged.
format	article
author	Alexander Omelyanchik Silvia Villa Gurvinder Singh Valeria Rodionova Sara Laureti Fabio Canepa Davide Peddis
author_facet	Alexander Omelyanchik Silvia Villa Gurvinder Singh Valeria Rodionova Sara Laureti Fabio Canepa Davide Peddis
author_sort	Alexander Omelyanchik
title	Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
title_short	Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
title_full	Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
title_fullStr	Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
title_full_unstemmed	Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells
title_sort	magnetic properties of bi-magnetic core/shell nanoparticles: the case of thin shells
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2700256d8db74311ae897be4b453e1f9
work_keys_str_mv	AT alexanderomelyanchik magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT silviavilla magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT gurvindersingh magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT valeriarodionova magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT saralaureti magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT fabiocanepa magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells AT davidepeddis magneticpropertiesofbimagneticcoreshellnanoparticlesthecaseofthinshells
_version_	1718411486857003008

Magnetic Properties of Bi-Magnetic Core/Shell Nanoparticles: The Case of Thin Shells

Ejemplares similares