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Abstract
Recently, MnTe was established as an altermagnetic material that hosts spin-polarized electronic bands as well as anomalous transport effects like the anomalous Hall effect. In addition to these effects arising from altermagnetism, MnTe also hosts other magnetoresistance effects. Here, we study the manipulation of the magnetic order by an applied magnetic field and its impact on the electrical resistivity. In particular, we establish which components of anisotropic magnetoresistance are present when the magnetic order is rotated within the hexagonal basal plane. Our experimental results, which are in agreement with our symmetry analysis of the magnetotransport components, showcase the existence of an anisotropic magnetoresistance linked to both the relative orientation of current and magnetic order, as well as crystal and magnetic order. Altermagnetism is manifested as a three-fold component in the transverse magnetoresistance which arises due to the anomalous Hall effect.
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1 Institute of Physics ASCR, v.v.i., Prague, Czechia (GRID:grid.424881.3) (ISNI:0000 0004 0634 148X); Leibniz Institute for Solid State and Materials Research, IFW Dresden, Dresden, Germany (GRID:grid.14841.38) (ISNI:0000 0000 9972 3583); Faculty of Mathematics and Physics, Charles University, Prague 2, Czechia (GRID:grid.4491.8) (ISNI:0000 0004 1937 116X)
2 Institute of Physics ASCR, v.v.i., Prague, Czechia (GRID:grid.424881.3) (ISNI:0000 0004 0634 148X); Faculty of Mathematics and Physics, Charles University, Prague 2, Czechia (GRID:grid.4491.8) (ISNI:0000 0004 1937 116X)
3 Institute of Physics ASCR, v.v.i., Prague, Czechia (GRID:grid.424881.3) (ISNI:0000 0004 0634 148X)
4 Helmholtz-Zentrum Dresden-Rossendorf, Hochfeld-Magnetlabor Dresden (HLD-EMFL), Dresden, Germany (GRID:grid.40602.30) (ISNI:0000 0001 2158 0612)
5 Johannes Kepler University Linz, Institute of Semiconductor and Solid State Physics, Linz, Austria (GRID:grid.9970.7) (ISNI:0000 0001 1941 5140)
6 Leibniz Institute for Solid State and Materials Research, IFW Dresden, Dresden, Germany (GRID:grid.14841.38) (ISNI:0000 0000 9972 3583); Technical University Dresden, Institut für Festkörper- und Materialphysik (IFMP), Dresden, Germany (GRID:grid.4488.0) (ISNI:0000 0001 2111 7257)
7 Institute of Physics ASCR, v.v.i., Prague, Czechia (GRID:grid.424881.3) (ISNI:0000 0004 0634 148X); University of Nottingham, School of Physics and Astronomy, Nottingham, UK (GRID:grid.4563.4) (ISNI:0000 0004 1936 8868)
8 Institute of Physics ASCR, v.v.i., Prague, Czechia (GRID:grid.424881.3) (ISNI:0000 0004 0634 148X); Technical University Dresden, Institut für Festkörper- und Materialphysik (IFMP), Dresden, Germany (GRID:grid.4488.0) (ISNI:0000 0001 2111 7257)