An antiferromagnet could generate electricity from waste heat

December 02, 2021

A giant anomalous Nernst effect was found in YbMnBi2

Researchers at the Max Planck Institute for Chemical Physics of Solids in Dresden, Germany, together with collaborators at the Ohio State University and the University of Cincinnati, have discovered, for the first time, a giant thermoelectric effect in an antiferromagnet. Their study shows, surprisingly, that antiferromagnets can have the same value of the anomalous Nernst effect as conventional ferromagnets, but without any stray magnetic fields that would otherwise affect surrounding devices. The newly discovered recipe for generating large Nernst voltages opens a new research direction for the development of highly efficient thermoelectric devices.

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