Conversion of Heat into Charge Current by the Spin Wave Anomalous Nernst Effect

M. Mizuguchi; K. Hasegawa; J. Ohe; M. Tsujikawa; M. Shirai; K. Takanashi

Conversion of Heat into Charge Current by the Spin Wave Anomalous Nernst Effect

Materials Science 2018-04-12 v1

Authors: M. Mizuguchi , K. Hasegawa , J. Ohe , M. Tsujikawa , M. Shirai , K. Takanashi

Abstract

A novel process of spin conversion from a temperature gradient to a transverse voltage is addressed in this paper, viz. the anomalous Nernst effect (ANE) in a ferromagnetic metal. We report that an additional voltage is superposed on the conventional anomalous Nernst voltage in FePt crystalline thin films. The dynamics of the local magnetization is modulated by the heat current and excites spin waves. These generate a conduction electron spin current via s-d coupling, which flows along the temperature gradient, and the spin current is converted to a Nernst voltage by the inverse spin Hall effect.

Keywords

anomalous nernst effect spin wave temperature gradient inverse spin hall effect ferromagnetic metal fept thin film

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@article{arxiv.1804.03751,
  title  = {Conversion of Heat into Charge Current by the Spin Wave Anomalous Nernst Effect},
  author = {M. Mizuguchi and K. Hasegawa and J. Ohe and M. Tsujikawa and M. Shirai and K. Takanashi},
  journal= {arXiv preprint arXiv:1804.03751},
  year   = {2018}
}

Conversion of Heat into Charge Current by the Spin Wave Anomalous Nernst Effect

Abstract

Keywords

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