Abstract
Specific features of nuclear magnetic resonance (NMR) in a ferromagnet with a crystallographic magnetic anisotropy of the easy-plane type placed in a constant magnetic field have been studied. The symmetry of the magnet admits the existence of the Dzyaloshinskii-Moriya interaction, which leads to the formation of a new ground state, namely, a soliton lattice (spiral structure). Within the spin-wave approximation, the following basic local characteristics of the NMR of this structure have been calculated: resonance frequency, enhancement factor, and line broadening and their field dependences have been investigated. The magnetic resonance susceptibility of the electron-nucleus spin system has been calculated; the shape of the NMR absorption line has been analyzed. The problem of the evolution of the NMR absorption line upon the change in the magnitude of an external magnetic field has been solved. The possibility of the experimental detection and investigation of the structural and dynamic features of the spiral magnetic structure by the NMR method is discussed.
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Original Russian Text © A.P. Tankeyev, M.A. Borich, V.V. Smagin, 2014, published in Fizika Metallov i Metallovedenie, 2014, Vol. 115, No. 3, pp. 248–259.
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Tankeyev, A.P., Borich, M.A. & Smagin, V.V. Nuclear magnetic resonance in magnets with a spiral magnetic structure. Phys. Metals Metallogr. 115, 232–242 (2014). https://doi.org/10.1134/S0031918X14030119
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DOI: https://doi.org/10.1134/S0031918X14030119