Saturated and Anisotropic Magnetostriction in an Altermagnet
arXiv:2605.30773 · doi:10.1021/jacs.6c02730
Abstract
Magnetostriction, a fundamental phenomenon bridging magnetism and mechanics, has enabled a broad spectrum of applications. For almost two centuries, it has been mainly investigated for ferromagnets. Regarding the magnetostriction of antiferromagnets (AFMs), limitedly known examples for both conventional collinear AFMs and noncollinear AFMs predominantly exhibit non-saturating magnetic-field dependence. Herein, we report an easily saturated magnetostriction effect in a prototypical altermagnet - MnTe, which is an emerging class of collinear AFMs with special crystal symmetries. For high-quality MnTe single crystals, the magnetostriction saturates under a moderate field of ~0.7 T with an intriguing two-fold-symmetry anisotropy. First-principles calculations reveal that the saturated and anisotropic magnetostriction originates from symmetry-allowed coupling between elastic strain and its Néel order parameter. These findings break the traditional wisdom on antiferromagnetic magnetostriction.
51 pages, 21 figures, 1 table, published at Journal of the American Chemical Society
References in corpus (26)
- Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
- Crystal Hall effect in Collinear Antiferromagnets
- Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
- Observation of spin splitting torque in a collinear antiferromagnet RuO2
- Broken Kramers' degeneracy in altermagnetic MnTe
- Tilted spin current generated by the collinear antiferromagnet RuO2
- Direct observation of altermagnetic band splitting in CrSb thin films
- Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
- Observation of spin-splitter torque in collinear antiferromagnetic RuO
- Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe
- Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
- Landau Theory of Altermagnetism
- X-ray Magnetic Circular Dichroism in Altermagnetic -MnTe
- Crystal-symmetry-paired spin-valley locking in a layered room-temperature antiferromagnet
- Magnetic anisotropy in antiferromagnetic hexagonal MnTe
- Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
- Giant strain-induced spin splitting effect in MnTe, a -wave altermagnetic semiconductor
- Magnetostriction, piezomagnetism and domain nucleation in a kagome antiferromagnet
- Interplay of altermagnetism and pressure in hexagonal and orthorhombic MnTe
- Spin-Splitting Magnetoresistance in Altermagnetic RuO2 Thin Films
- Circular Dichroism in Resonant Inelastic X-ray Scattering: Probing Altermagnetic Domains in MnTe
- Curvature induced magnetization of altermagnetic films
- Spin-frame field theory of a three-sublattice antiferromagnet
- Circular dichroism in resonant photoelectron diffraction as a direct probe of sublattice magnetization in altermagnets
- TbPt6Al3: A rare-earth-based g-wave altermagnet with a honeycomb structure
- Electric-Field-Controlled Altermagnetic Transition for Neuromorphic Computing