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

Research output: Contribution to journalArticlepeer-review

229 Scopus citations

Abstract

A scannable laser beam is used to generate local thermal gradients in metallic (Co 2FeAl) or insulating (Y 3Fe 5O 12) 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 Co 2FeAl 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 Y 3Fe 5O 12. Our findings establish local thermal spin and charge current generation as well as spin caloritronic domain imaging.

Original languageEnglish
Article number106602
JournalPhysical Review Letters
Volume108
Issue number10
DOIs
StatePublished - 5 Mar 2012
Externally publishedYes

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