Abstract
The resistivity of spin glasses with momentum independent static susceptibilityχ k =χ due to the disorder of the spin system and to spin excitations is calculated to lowest order in the temperatureT, and above the freezing temperatureT f . The diffusive modes proposed by Dzyaloshinskii and Volovik lead for
to a resistivity of the formρ=AT 2 −BT 5/2 with positive coefficientsA andB. TheT 3/2 contribution observed by Ford and Mydosh can be explained by the existence of ferromagnetic clusters. For
, a classical theory with
1 for all excitation energiesω and withχ k =χ leads to a constant resistivity (the Yosida limit). The observed increase of the resistivity aboveT f can be explained by rather strong magnetic short range order.
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Fischer, K.H. On the electrical resistivity of spin glasses. Z Physik B 34, 45–53 (1979). https://doi.org/10.1007/BF01362778
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DOI: https://doi.org/10.1007/BF01362778