Determination of the zero-field magnetic structure of the helimagnet MnSi at low temperature

Abstract

Below a temperature of approximately 29 K the manganese magnetic moments of the cubic binary compound MnSi order to a long-range incommensurate helical magnetic structure. Here, we quantitatively analyze a high-statistic zero-field muon spin rotation spectrum recorded in the magnetically ordered phase of MnSi by exploiting the result of representation theory as applied to the determination of magnetic structures. Instead of a gradual rotation of the magnetic moments when moving along a <111> axis, we find that the angle of rotation between the moments of certain subsequent planes is essentially quenched. It is the magnetization of pairs of planes which rotates when moving along a <111> axis, thus preserving the overall helical structure.

arXiv comment10 pages, 4 figures

References in corpus (10)

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• Multi-shell contribution to the Dzyaloshinskii-Moriya spiralling in MnSi-type crystals
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• Field-orientation-dependent magnetic phases in GdRu${}_2$Si${}_2$ probed with muon-spin spectroscopy
• On the robustness of the MnSi magnetic structure determined by muon spin rotation
• Antiferromagnetic spin cantings as a driving force of ferroelectricity in multiferroic Cu2OSeO3
• A general model of MnSi-like spiral magnets
• Frustration and chirality in three-dimensional trillium lattices: Insights and Perspectives
• Probing current-induced magnetic fields in Au|YIG heterostructure with low-energy muon spectroscopy
• Zero-field 29Si nuclear magnetic resonance signature of helimagnons in MnSi
• 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
• 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
• Magnetic structure and crystal field states of antiferromagnetic CeNiGe${}_3$: Neutron scattering and $\mu$SR investigations