Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00498166" target="_blank" >RIV/68378271:_____/18:00498166 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/1.5048690" target="_blank" >https://doi.org/10.1063/1.5048690</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5048690" target="_blank" >10.1063/1.5048690</a>

Result language
angličtina
Original language name
Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa
Original language description
The magneto-thermoelectric properties of Heusler compound thin films are very diverse. Here, we discuss the anomalous Nernst response of Co2MnGa thin films. We systematically study the anomalous Nernst coefficient as a function of temperature, and we show that unlike the anomalous Hall effect, the anomalous Nernst effect in Co2MnGa strongly varies with temperature. We exploit the on-chip thermometry technique to quantify the thermal gradient, which enables us to directly evaluate the anomalous Nernst coefficient. We compare these results to a reference CoFeB thin film. We show that the 50-nm-thick Co2MnGa films exhibit a large anomalous Nernst effect of −2 μV/K at 300 K, whereas the 10-nm-thick Co2MnGa film exhibits a significantly smaller anomalous Nernst coefficient despite having similar volume magnetizations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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