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Position: Home > issue > May 28, 2021 Volume 2, Issue 2
Generic Seebeck Effect from Spin Entropy
Category:   Report   Download:  PDF  Figure  Endnote
Author: Peijie Sun, K. Ramesh Kumar, Meng Lyu, Zhen Wang, Junsen Xiang, Wenqing Zhang

2.jpg

Graphical abstract


How magnetism affects the Seebeck effect is an important issue of wide concern in the thermoelectric community but remains elusive. Based on a thermodynamic analysis of spin degrees of freedom on varied d-electron-based ferromagnets and antiferromagnets, we demonstrate that in itinerant or partially itinerant magnetic compounds there exists a generic spin contribution to the Seebeck effect over an extended temperature range from slightly below to well above the magnetic transition temperature. This contribution is interpreted as resulting from transport spin entropy of (partially) delocalized conducting d electrons with strong thermal spin fluctuations, even semiquantitatively in a single-band case, in addition to the conventional diffusion part arising from their kinetic degrees of freedom.





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