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Coupled hard–soft spinel ferrite-based core–shell nanoarchitectures: magnetic properties and heating abilities

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Abstract

Bi-magnetic core–shell spinel ferrite-based nanoparticles with different CoFe2O4 core size, chemical nature of the shell (MnFe2O4 and spinel iron oxide), and shell thickness were prepared using an efficient solvothermal approach to exploit the magnetic coupling between a hard and a soft ferrimagnetic phase for magnetic heat induction. The magnetic behavior, together with morphology, stoichiometry, cation distribution, and spin canting, were investigated to identify the key parameters affecting the heat release. General trends in the heating abilities, as a function of the core size, the nature and the thickness of the shell, were hypothesized based on this systematic fundamental study and confirmed by experiments conducted on the water-based ferrofluids.

Graphical abstract: Coupled hard–soft spinel ferrite-based core–shell nanoarchitectures: magnetic properties and heating abilities

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Supplementary files

Article information


Submitted
18 Feb 2020
Accepted
05 May 2020
First published
06 May 2020

This article is Open Access

Nanoscale Adv., 2020, Advance Article
Article type
Paper

Coupled hard–soft spinel ferrite-based core–shell nanoarchitectures: magnetic properties and heating abilities

M. Sanna Angotzi, V. Mameli, C. Cara, A. Musinu, C. Sangregorio, D. Niznansky, H. L. Xin, J. Vejpravova and C. Cannas, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/D0NA00134A

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