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Tuning the Magnetic Properties of Nanoparticles

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Author(s): Arati G. Kolhatkar | Andrew C. Jamison | Dmitri Litvinov | Richard C. Willson | T. Randall Lee

Journal: International Journal of Molecular Sciences
ISSN 1422-0067

Volume: 14;
Issue: 8;
Start page: 15977;
Date: 2013;
Original page

Keywords: modulating | magnetization | coercivity | relaxation | magnetic properties | size | shape | composition | shell-core | nanoparticle

ABSTRACT
The tremendous interest in magnetic nanoparticles (MNPs) is reflected in published research that ranges from novel methods of synthesis of unique nanoparticle shapes and composite structures to a large number of MNP characterization techniques, and finally to their use in many biomedical and nanotechnology-based applications. The knowledge gained from this vast body of research can be made more useful if we organize the associated results to correlate key magnetic properties with the parameters that influence them. Tuning these properties of MNPs will allow us to tailor nanoparticles for specific applications, thus increasing their effectiveness. The complex magnetic behavior exhibited by MNPs is governed by many factors; these factors can either improve or adversely affect the desired magnetic properties. In this report, we have outlined a matrix of parameters that can be varied to tune the magnetic properties of nanoparticles. For practical utility, this review focuses on the effect of size, shape, composition, and shell-core structure on saturation magnetization, coercivity, blocking temperature, and relaxation time.

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