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Issue 8, 2019

Magnetically enhancing the Seebeck coefficient in ferrofluids

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Abstract

The influence of the magnetic field on the Seebeck coefficient (Se) was investigated in dilute magnetic nanofluids (ferrofluids) composed of maghemite magnetic nanoparticles dispersed in dimethyl-sulfoxide (DMSO). A 25% increase in the Se value was found when the external magnetic field was applied perpendicularly to the temperature gradient, reminiscent of an increase in the Soret coefficient (ST, concentration gradient) observed in the same fluids. In-depth analysis of experimental data, however, revealed that different mechanisms are responsible for the observed magneto-thermoelectric and -thermodiffusive phenomena. Possible physical and physico-chemical origins leading to the enhancement of the fluids' Seebeck coefficient are discussed.

Graphical abstract: Magnetically enhancing the Seebeck coefficient in ferrofluids

Article information


Submitted
21 Feb 2019
Accepted
03 Jun 2019
First published
06 Jun 2019

This article is Open Access

Nanoscale Adv., 2019,1, 2979-2989
Article type
Paper

Magnetically enhancing the Seebeck coefficient in ferrofluids

T. J. Salez, M. Kouyaté, C. Filomeno, M. Bonetti, M. Roger, G. Demouchy, E. Dubois, R. Perzynski, A. Cēbers and S. Nakamae, Nanoscale Adv., 2019, 1, 2979 DOI: 10.1039/C9NA00109C

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