Local charge and spin currents in magnetothermal landscapes

Mathias Weiler; Matthias Althammer; Franz D. Czeschka; Hans Huebl; Martin S. Wagner; Matthias Opel; Inga-Mareen Imort; Günter Reiss; Andy Thomas; Rudolf Gross; Sebastian T. B. Goennenwein

doi:10.1103/PhysRevLett.108.106602

Local charge and spin currents in magnetothermal landscapes

Materials Science 2012-03-06 v1

Authors: Mathias Weiler , Matthias Althammer , Franz D. Czeschka , Hans Huebl , Martin S. Wagner , Matthias Opel , Inga-Mareen Imort , Günter Reiss , Andy Thomas , Rudolf Gross , Sebastian T. B. Goennenwein

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Abstract

A scannable laser beam is used to generate local thermal gradients in metallic (Co2FeAl) or insulating (Y3Fe5O12) ferromagnetic thin films. We study the resulting local charge and spin currents that arise due to the anomalous Nernst effect (ANE) and the spin Seebeck effect (SSE), respectively. In the local ANE experiments, we detect the voltage in the Co2FeAl thin film plane as a function of the laser spot position and external magnetic field magnitude and orientation. The local SSE effect is detected in a similar fashion by exploiting the inverse spin Hall effect in a Pt layer deposited on top of the Y3Fe5O12. Our findings establish local thermal spin and charge current generation as well as spin caloritronic domain imaging.

Keywords

local thermal gradients anomalous Nernst effect spin Seebeck effect charge currents spin currents spin caloritronics Co2FeAl Y3Fe5O12

Cite

@article{arxiv.1110.3981,
  title  = {Local charge and spin currents in magnetothermal landscapes},
  author = {Mathias Weiler and Matthias Althammer and Franz D. Czeschka and Hans Huebl and Martin S. Wagner and Matthias Opel and Inga-Mareen Imort and Günter Reiss and Andy Thomas and Rudolf Gross and Sebastian T. B. Goennenwein},
  journal= {arXiv preprint arXiv:1110.3981},
  year   = {2012}
}

Local charge and spin currents in magnetothermal landscapes

Abstract

Keywords

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