KOPS - The Institutional Repository of the University of Konstanz

Large anomalous Nernst effect in thin films of the Weyl semimetal Co<sub>2</sub>MnGa

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

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

REICHLOVA, Helena, Richard SCHLITZ, Sebastian BECKERT, Peter SWEKIS, Anastasios MARKOU, Yi-Cheng CHEN, Dominik KRIEGNER, Savio FABRETTI, Gyu HYEON PARK, Sebastian T. B. GÖNNENWEIN, 2018. Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa. In: Applied Physics Letters. American Institute of Physics (AIP). 113(21), 212405. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.5048690

@article{Reichlova2018-07-17T15:12:43ZLarge-52286, title={Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa}, year={2018}, doi={10.1063/1.5048690}, number={21}, volume={113}, issn={0003-6951}, journal={Applied Physics Letters}, author={Reichlova, Helena and Schlitz, Richard and Beckert, Sebastian and Swekis, Peter and Markou, Anastasios and Chen, Yi-Cheng and Kriegner, Dominik and Fabretti, Savio and Hyeon Park, Gyu and Gönnenwein, Sebastian T. B.}, note={Article Number: 212405} }

Beckert, Sebastian Hyeon Park, Gyu eng Markou, Anastasios Swekis, Peter Reichlova, Helena terms-of-use 2018-07-17T15:12:43Z Kriegner, Dominik Large anomalous Nernst effect in thin films of the Weyl semimetal Co<sub>2</sub>MnGa Kriegner, Dominik Gönnenwein, Sebastian T. B. Reichlova, Helena 2021-01-05T10:43:22Z Swekis, Peter Schlitz, Richard 2021-01-05T10:43:22Z Schlitz, Richard Markou, Anastasios Chen, Yi-Cheng Hyeon Park, Gyu Beckert, Sebastian Chen, Yi-Cheng Fabretti, Savio Fabretti, Savio The magneto-thermoelectric properties of Heusler compound thin films are very diverse. Here, we discuss the anomalous Nernst response of Co<sub>2</sub>MnGa 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 Co<sub>2</sub>MnGa 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 Co<sub>2</sub>MnGa films exhibit a large anomalous Nernst effect of −2 μV/K at 300 K, whereas the 10-nm-thick Co<sub>2</sub>MnGa film exhibits a significantly smaller anomalous Nernst coefficient despite having similar volume magnetizations. These findings suggest that the microscopic origin of the anomalous Nernst effect in Co<sub>2</sub>MnGa is complex and may contain contributions from skew-scattering, side-jump or intrinsic Berry phase. In any case, the large anomalous Nernst coefficent of Co<sub>2</sub>MnGa thin films at room temperature makes this material system a very promising candidate for efficient spin-caloritronic devices. Gönnenwein, Sebastian T. B.

This item appears in the following Collection(s)

Search KOPS


Browse

My Account