Magnetically enhancing the Seebeck coefficient in ferrofluids

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...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale advances 2019-08, Vol.1 (8), p.2979-2989
Main Authors: Salez, Thomas J, Kouyat, Mansour, Filomeno, Cleber, Bonetti, Marco, Roger, Michel, Demouchy, Gilles, Dubois, Emmanuelle, Perzynski, Rgine, Cbers, Andrejs, Nakamae, Sawako
Format: Article
Language:English
Subjects:
Chemistry
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 ( S T , 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. A thermogalvanic cell containing nanofluids under working conditions.
ISSN:2516-0230
2516-0230
DOI:10.1039/c9na00109c