High mobility charge transport in a multicarrier altermagnet CrSb

Altermagnets are unconventional type of magnetic materials with intriguing properties. CrSb is particularly important because of its high ordering temperature and large spin-splitting energy. Here, the authors measured the magnetotransport properties of CrSb. Employing focused-ion-beam machining, they prepared micro-sized lamellar samples to measure all independent Hall tensor components. The Hall resistivity was highly non-linear at low temperatures, but an anomalous Hall effect was ruled out by symmetry-based considerations. Instead, the magnetotransport properties are well explained by a multicarrier effect. Notably, the analysis revealed the presence of carriers with the highest mobility reported for altermagnets so far.