Local charge and spin currents in magnetothermal landscapes
| Autor: | Inga-Mareen Imort, Matthias Althammer, Matthias Opel, Martin Wagner, Franz D. Czeschka, Hans Huebl, Mathias Weiler, Sebastian T. B. Goennenwein, Andy Thomas, Rudolf Gross, Günter Reiss |
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| Rok vydání: | 2011 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Spin polarization Condensed matter physics General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Charge (physics) symbols.namesake Thermoelectric effect symbols Spin Hall effect Condensed Matter::Strongly Correlated Electrons Thin film Nernst effect Spin-½ Voltage |
| Zdroj: | Physical review letters. 108(10) |
| ISSN: | 1079-7114 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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