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On the electrical resistivity of spin glasses

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Zeitschrift für Physik B Condensed Matter

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 2BT 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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SFB 125 Aachen-Jülich-Köln

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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

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