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磁性增强铁磁流体中的塞贝克系数。

Magnetically enhancing the Seebeck coefficient in ferrofluids.

作者信息

Salez Thomas J, Kouyaté Mansour, Filomeno Cleber, Bonetti Marco, Roger Michel, Demouchy Gilles, Dubois Emmanuelle, Perzynski Régine, Cēbers Andrejs, Nakamae Sawako

机构信息

Service de physique de l'état condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay 91191 Gif-sur-Yvette Cedex France

École des Ponts ParisTech 6 et 8 avenue Blaise Pascal, Champs-sur-Marne F-77455 Marne-la-Vallée France.

出版信息

Nanoscale Adv. 2019 Jun 6;1(8):2979-2989. doi: 10.1039/c9na00109c. eCollection 2019 Aug 6.

DOI:10.1039/c9na00109c
PMID:36133602
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9419873/
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 ( , 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.

摘要

研究了磁场对由分散在二甲基亚砜（DMSO）中的磁赤铁矿磁性纳米颗粒组成的稀磁纳米流体（铁磁流体）的塞贝克系数（Se）的影响。当外部磁场垂直于温度梯度施加时，发现Se值增加了25%，这让人联想到在相同流体中观察到的索雷特系数（，浓度梯度）的增加。然而，对实验数据的深入分析表明，不同的机制导致了观察到的磁热电和热扩散现象。讨论了导致流体塞贝克系数增强的可能的物理和物理化学起源。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/144e/9419873/3a4f3ef6c185/c9na00109c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/144e/9419873/65d6ca68df19/c9na00109c-f1.jpg
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