Spin-waves in the collinear antiferromagnetic phase of Mn$_\bf{5}$Si$_\bf{3}$

Abstract

By combining two independent approaches, inelastic neutron scattering measurements and density functional theory calculations, we study the spin-waves in the high-temperature collinear antiferromagnetic phase (AFM2) of Mn${}_5$Si${}_3$. We obtain its magnetic ground-state properties and electronic structure. This study allowed us to determine the dominant magnetic exchange interactions and magnetocrystalline anisotropy in the AFM2 phase of Mn${}_5$Si${}_3$. Moreover, the evolution of the spin excitation spectrum is investigated under the influence of an external magnetic field perpendicular to the anisotropy easy-axis. The low energy magnon modes show a different magnetic field dependence which is a direct consequence of their different precessional nature. Finally, possible effects related to the Dzyaloshinskii-Moriya interaction are also considered.

10 pages, 8 figures

References in corpus (3)

• Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet
• Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
• Magnetic phase diagram, magnetotransport and inverse magnetocaloric effect in the noncollinear antiferromagnet Mn${}_5$Si${}_3$

Cited by in corpus (6)

• Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet Mn${}_5$Ge${}_3$
• Complex magnetic structure and spin waves of the noncollinear antiferromagnet Mn5Si3
• Anomalous Nernst effect in the noncollinear antiferromagnet Mn${}_5$Si${}_3$
• An overview of the spin dynamics of antiferromagnetic Mn${}_5$Si${}_3$
• Optical signatures of spin symmetries in unconventional magnets
• Eightfold Degenerate Dirac Nodal Line in Collinear Antiferromagnet Mn${}_5$Si${}_3$