A joint publication with Jairo Sinova and Libor Šmejkal about the saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 has been published in APL Materials.
They used a field-induced reorientation of the Néel vector from the easy-axis toward the [110] hard-axis to demonstrate the anomalous Hall signal in this RuO2. They 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 their measurements at extreme magnetic fields up to 68 T, they 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.