Crossover from relativistic to non-relativistic net magnetization for MnTe altermagnet candidate

Abstract

We experimentally study magnetization reversal curves for MnTe single crystals, which is the altermagnetic candidate. Above 85~K temperature, we confirm the antiferromagnetic behavior of magnetization $M$, which is known for $\alpha$--MnTe. Below 85~K, we observe anomalous low-field magnetization behavior, which is accompanied by the sophisticated $M(\alpha )$ angle dependence with beating pattern as the interplay between $M(\alpha )$ maxima and minima: in low fields, $M(\alpha )$ shows ferromagnetic-like 180${}^{\circ }$ periodicity, while at high magnetic fields, the periodicity is changed to the 90${}^{\circ }$ one. This angle dependence is the most striking result of our experiment, while it can not be expected for standard magnetic systems. In contrast, in altermagnets, symmetry allows ferromagnetic behavior only due to the spin-orbit coupling. Thus, we claim that our experiment shows the effect of weak spin-orbit coupling in MnTe, with crossover from relativistic to non-relativistic net magnetization, and, therefore, we experimentally confirm altermagnetism in MnTe.

References in corpus (24)

• Topological Insulators
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Crystal Hall effect in Collinear Antiferromagnets
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
• Observation of Magnetic Skyrmion Bubbles in a van der Waals ferromagnet Fe3GeTe2
• Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe
• Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
• dc Josephson Effect in Altermagnets
• Topological magnetic-spin textures in two-dimensional van der Waals Cr2Ge2Te6
• Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 tri-layer heterostructures
• Altermagnetism with Non-collinear Spins
• Magnetic anisotropy in antiferromagnetic hexagonal MnTe
• Essential role of anisotropic magnetic dipole in anomalous Hall effect
• Low Temperature Neutron Diffraction Study of MnTe
• Transport across junctions of altermagnets with normal metals and ferromagnets
• Chiral Dirac fermion in a collinear antiferromagnet
• Magnetic properties and spin structure of MnO single crystal and powder
• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$

Cited by in corpus (5)

• Superconducting phenomena in systems with unconventional magnets
• Tunable second harmornic in altermagnetic Josephson junctions
• Transverse Spin current at the normal/p-wave magnet junctions
• Revisiting the symmetry and optical phonons of altermagnetic $\alpha$-MnTe
• Magnetization symmetry for the MnTe altermagnetic candidate