Dual nature of magnetism in MnSi

The temperature dependence of the manganese magnetic moment and the spin-lattice relaxation rate, both measured by the muon spin relaxation technique in the magnetically ordered phase of the chiral intermetallic cubic MnSi system, is explained in terms of helimagnon excitations of a localized spin m...

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Bibliographic Details
Published in:Physical review research 2020-01, Vol.2 (1), p.013029, Article 013029
Main Authors: Yaouanc, A., Dalmas de Réotier, P., Roessli, B., Maisuradze, A., Amato, A., Andreica, D., Lapertot, G.
Format: Article
Language:English
Subjects:
Condensed Matter
Physics
Strongly Correlated Electrons
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Summary:The temperature dependence of the manganese magnetic moment and the spin-lattice relaxation rate, both measured by the muon spin relaxation technique in the magnetically ordered phase of the chiral intermetallic cubic MnSi system, is 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. Besides, we note that the analysis framework can be applied to other helimagnets such as the magnetoelectric compound Cu_{2}OSeO_{3}.
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.2.013029