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.

arXiv comment6 pages, 4 figures, accepted for publication in Phys. Rev. B

References in corpus (11)

• Skyrmion Lattice in a Chiral Magnet
• New Perspectives for Rashba Spin-Orbit Coupling
• Spectroscopic confirmation of linear relation between Heisenberg- and interfacial Dzyaloshinskii-Moriya-exchange in polycrystalline metal films
• Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film
• Asymmetric Spin-wave Dispersion on Fe(110): Direct Evidence of Dzyaloshinskii--Moriya Interaction
• Nonreciprocal spin wave propagation in chiral-lattice ferromagnets
• Nonreciprocal magnon propagation in a noncentrosymmetric ferromagnet
• Helimagnon Bands as Universal Spin Excitations of Chiral Magnets
• Magnon-Mediated Dzyaloshinskii-Moriya Torque in Homogeneous Ferromagnets
• Frustrated magnetic helices in MnSi-type crystals
• Inelastic Neutron and X-ray Scattering from Incommensurate Magnetic Systems

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• Nonreciprocal Magnon by Symmetric Anisotropic Exchange Interaction in Honeycomb Antiferromagnet
• Topological magnon band structure of emergent Landau levels in a skyrmion lattice
• Designing Rashba-Dresselhaus effect in magnetic insulators
• Temperature scaling of the Dzyaloshinsky-Moriya interaction in the spin wave spectrum
• Nonreciprocal spin Seebeck effect in antiferromagnets
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• Non-reciprocal magnons in non-centrosymmetric MnSi
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• Confined dipole and exchange spin waves in a bulk chiral magnet with Dzyaloshinskii-Moriya interaction
• Universal spin wave damping in magnetic Weyl semimetals
• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Dzyaloshinskii-Moriya interaction in strongly spin-orbit-coupled systems: General formula and application to topological and Rashba materials
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• Zero-field 29Si nuclear magnetic resonance signature of helimagnons in MnSi
• Nonreciprocal Spin Waves in Nanoscale Domain Walls Detected by Scanning X-ray Microscopy in Perpendicular Magnetic Anisotropic Fe/Gd Multilayers
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• Origin of the suppression of magnetic order in MnSi under hydrostatic pressure