Magnon dispersion shift in the induced-ferromagnetic phase of the noncentrosymmetric MnSi

Abstract

Small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced-ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or anti-parallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.

6 pages, 4 figures, accepted for publication in Phys. Rev. B

References in corpus (1)

• Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film

Cited by in corpus (8)

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• Dual nature of magnetism in MnSi
• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Quantum information diode based on a magnonic crystal
• Origin of the suppression of magnetic order in MnSi under hydrostatic pressure
• Nonreciprocal magnon excitations by the Dzyaloshinskii-Moriya interaction on the basis of bond magnetic toroidal multipoles