Dual nature of magnetism in MnSi

Abstract

The temperature dependence of the manganese magnetic moment and the spin-lattice relaxation rate measured by the muon spin relaxation technique in the magnetically ordered phase of the chiral intermetallic cubic MnSi system are both explained in terms of helimagnon excitations of a localized spin model. The two free parameters characterizing the helimagnon dispersion relation are determined. A combined analysis of the two data sets cannot be achieved using the self-consistent renormalization theory of spin fluctuations which assumes the magnetism of MnSi to arise uniquely from electronic bands. As a result of this work, MnSi is proposed to be a dual electronic system composed of localized and itinerant magnetic electrons. Finally we note that the analysis framework can be applied to other helimagnets such as the magnetoelectric compound Cu2OSeO3.

arXiv comment12 pages, 6 figures

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Cited by in corpus (11)

• Rashba-Zener mechanism for nanoscale skyrmions and topological metals
• Putative helimagnetic phase in the kagome metal Co_3Sn_2-xIn_xS_2
• New Microscopic Magnetic Hamiltonian for Exotic Spin Textures in Metals
• Evolution of Helimagnetic Correlations when approaching the Quantum Critical Point of Mn${}_{1-x}$Fe${}_x$Si
• Site-specific electronic and magnetic excitations of the skyrmion material Cu${}_2$OSeO${}_3$
• A general model of MnSi-like spiral magnets
• Power-law dynamics in the spin-liquid kagome lattices SrCr8Ga4O19 and ZnCu3(OH)6Cl2
• Experimental determination of the spin Hamiltonian of the cubic chiral magnet MnSi
• Zero-field 29Si nuclear magnetic resonance signature of helimagnons in MnSi
• Why paramagnetic chiral correlations in the long wavelength limit do not contribute to muon-spin relaxation
• Origin of the suppression of magnetic order in MnSi under hydrostatic pressure