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Ferromagnetic modes in spin glasses and dilute ferromagnets

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Zeitschrift für Physik B Condensed Matter

Abstract

We generalize the theories for the dynamics of spin glasses of Halperin and Saslow, and Dzyaloshinskii and Volovik to include additional partial ferromagnetic order. We find that the sixfold degenerate antiferromagnetic spin wave modes obtained in both theories split into two longitudinal and 2×2 transverse modes with different dispersion. In a certain range of wave vectorsq one obtains antiferromagnetic, ferromagnetic, andq-independent modes. The damping of these modes is calculated for a phenomelogical hydrodynamic model and their implications for the specific heat and electrical resistivity are discussed.

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  1. Institut für Festkörperforschung der Kernforschungsanlage Jülich, Postfach 1913, D-5170, Jülich 1, Germany

    K. H. Fischer

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Fischer, K.H. Ferromagnetic modes in spin glasses and dilute ferromagnets. Z. Physik B - Condensed Matter 39, 37–46 (1980). https://doi.org/10.1007/BF01292636

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  • DOI: https://doi.org/10.1007/BF01292636

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