%0 Journal Article %1 Tschirner_2023 %A Tschirner, Teresa %A Keßler, Philipp %A Betancourt, Ruben Dario Gonzalez %A Kotte, Tommy %A Kriegner, Dominik %A Büchner, Bernd %A Dufouleur, Joseph %A Kamp, Martin %A Jovic, Vedran %A Smejkal, Libor %A Sinova, Jairo %A Claessen, Ralph %A Jungwirth, Tomas %A Moser, Simon %A Reichlova, Helena %A Veyrat, Louis %D 2023 %I AIP Publishing %J APL Mater. %K a %N 10 %P 101103 %R 10.1063/5.0160335 %T Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO$_2$ %U https://doi.org/10.1063%2F5.0160335 %V 11 %X Observations of the anomalous Hall effect in RuO2 and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermagnets. While in MnTe, the unconventional anomalous Hall signal accompanied by a vanishing magnetization is observable at remanence, the anomalous Hall effect in RuO2 is excluded by symmetry for the Néel vector pointing along the zero-field 001 easy-axis. Guided by a symmetry analysis and ab initio calculations, a field-induced reorientation of the Néel vector from the easy-axis toward the 110 hard-axis was used to demonstrate the anomalous Hall signal in this altermagnet. We confirm the existence of an anomalous Hall effect in our RuO2 thin-film samples, whose set of magnetic and magneto-transport characteristics is consistent with the earlier report. By performing our measurements at extreme magnetic fields up to 68 T, we reach saturation of the anomalous Hall signal at a field Hc ≃ 55 T that was inaccessible in earlier studies but is consistent with the expected Néel-vector reorientation field.

@article{Tschirner_2023, abstract = {Observations of the anomalous Hall effect in RuO2 and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermagnets. While in MnTe, the unconventional anomalous Hall signal accompanied by a vanishing magnetization is observable at remanence, the anomalous Hall effect in RuO2 is excluded by symmetry for the Néel vector pointing along the zero-field [001] easy-axis. Guided by a symmetry analysis and ab initio calculations, a field-induced reorientation of the Néel vector from the easy-axis toward the [110] hard-axis was used to demonstrate the anomalous Hall signal in this altermagnet. We confirm the existence of an anomalous Hall effect in our RuO2 thin-film samples, whose set of magnetic and magneto-transport characteristics is consistent with the earlier report. By performing our measurements at extreme magnetic fields up to 68 T, we reach saturation of the anomalous Hall signal at a field Hc ≃ 55 T that was inaccessible in earlier studies but is consistent with the expected Néel-vector reorientation field.}, added-at = {2023-10-05T08:38:33.000+0200}, author = {Tschirner, Teresa and Keßler, Philipp and Betancourt, Ruben Dario Gonzalez and Kotte, Tommy and Kriegner, Dominik and Büchner, Bernd and Dufouleur, Joseph and Kamp, Martin and Jovic, Vedran and Smejkal, Libor and Sinova, Jairo and Claessen, Ralph and Jungwirth, Tomas and Moser, Simon and Reichlova, Helena and Veyrat, Louis}, biburl = {https://www.bibsonomy.org/bibtex/2682a3c91b24c3855a2ab12248b5ea702/ctqmat}, day = 02, description = {Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 | APL Materials | AIP Publishing}, doi = {10.1063/5.0160335}, interhash = {305108887a3b21271876cc5a5d079f56}, intrahash = {682a3c91b24c3855a2ab12248b5ea702}, journal = {APL Mater.}, keywords = {a}, month = {10}, number = 10, pages = {101103 }, publisher = {AIP Publishing}, timestamp = {2023-10-31T10:54:41.000+0100}, title = {Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO$_{\mathbf{2}}$}, url = {https://doi.org/10.1063%2F5.0160335}, volume = 11, year = 2023 }