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Synthesis And Properties Of Magnetic Nanoparticles With Tunable Magnetic Anisotropy Energy

Published online by Cambridge University Press:  22 May 2014

Vincent Dupuis ,
Véronica Gavrilov-Isaac ,
Sophie Neveu ,
Merwen Aouadi  and
Sébastien Abramson
Vincent Dupuis
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F-75005 Paris, France CNRS, UMR 8234, PHENIX, F-75005 Paris, France,
Véronica Gavrilov-Isaac
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F-75005 Paris, France CNRS, UMR 8234, PHENIX, F-75005 Paris, France,
Sophie Neveu
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F-75005 Paris, France CNRS, UMR 8234, PHENIX, F-75005 Paris, France,
Merwen Aouadi
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F-75005 Paris, France CNRS, UMR 8234, PHENIX, F-75005 Paris, France,
Sébastien Abramson
Affiliation:
Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F-75005 Paris, France CNRS, UMR 8234, PHENIX, F-75005 Paris, France,
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Abstract

In this paper, we discuss several strategies to tailor magnetic properties related to the magnetic anisotropy energy, such as the blocking temperature or the low temperature coercivity, of magnetic nanoparticles or materials made with magnetic nanoparticles. We describe a first approach that consists in synthesizing and dispersing bi and tri-magnetic core-shell nanoparticles that include a core made of a material with a weak anisotropy energy density and a shell made with a material with a large anisotropy energy density. This approach is a promising route to tune the blocking temperature of low temperature coercivity of a particle without altering its magnetization and with a good control of its size. Additionally, we also explore another route for the control of the shape of the hysteresis loop of material made with magnetic nanoparticles that consists in the simple mixture of magnetically soft and hard magnetic nanoparticles to create binary mixtures. In this case, it is the mixing ratio that allows one to adjust the properties of the final material.

Keywords

nanostructuremagnetic propertiesmagnetic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1708: Symposium VV – Modeling and Theory-Driven Design of Soft Materials , 2014 , mrss14-1708-vv02-06
Copyright
Copyright © Materials Research Society 2014 

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