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Local Charge and Spin Currents in Magnetothermal Landscapes

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2012

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Weiler, Mathias
Althammer, Matthias
Czeschka, Franz D.
Huebl, Hans
Wagner, Martin S.
Opel, Matthias
Imort, Inga-Mareen
Reiss, Günter
Thomas, Andy
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https://doi.org/10.1103/PhysRevLett.108.106602
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http://arxiv.org/abs/1110.3981

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Physical Review Letters. American Physical Society (APS). 2012, 108(10), 106602. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.108.106602

Zusammenfassung

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.

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ISO 690WEILER, Mathias, Matthias ALTHAMMER, Franz D. CZESCHKA, Hans HUEBL, Martin S. WAGNER, Matthias OPEL, Inga-Mareen IMORT, Günter REISS, Andy THOMAS, Sebastian T. B. GOENNENWEIN, 2012. Local Charge and Spin Currents in Magnetothermal Landscapes. In: Physical Review Letters. American Physical Society (APS). 2012, 108(10), 106602. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.108.106602
BibTex
@article{Weiler2012-03-09Local-52353,
  year={2012},
  doi={10.1103/PhysRevLett.108.106602},
  title={Local Charge and Spin Currents in Magnetothermal Landscapes},
  number={10},
  volume={108},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Weiler, Mathias and Althammer, Matthias and Czeschka, Franz D. and Huebl, Hans and Wagner, Martin S. and Opel, Matthias and Imort, Inga-Mareen and Reiss, Günter and Thomas, Andy and Goennenwein, Sebastian T. B.},
  note={Article Number: 106602}
}
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    <dcterms:abstract xml:lang="eng">A scannable laser beam is used to generate local thermal gradients in metallic (Co&lt;sub&gt;2&lt;/sub&gt;FeAl) or insulating (Y&lt;sub&gt;3&lt;/sub&gt;Fe&lt;sub&gt;5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;) 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&lt;sub&gt;2&lt;/sub&gt;FeAl 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&lt;sub&gt;3&lt;/sub&gt;Fe&lt;sub&gt;5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;. Our findings establish local thermal spin and charge current generation as well as spin caloritronic domain imaging.</dcterms:abstract>
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