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On the investigation of magnetic critical phenomena in ferromagnets by μSR and PAC

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Abstract

On the basis of current theoretical views on the critical phenomena in isotropic Heisenberg ferromagnets the power temperature behavior Λ=c(τ)λ0τ-w has been derived for the muon spin relaxation rate Λ as π-T −1c (T-T c ) → 0+. It is shown that the crossover from an exchange critical regime to a dipolar one is accompanied not only with the change in the critical exponentw in the above law, but also with the reduction of the coefficientc(π). A comparison with the temperature behaviour of the inverse nuclear relaxation timet −1R measured in the PAC experiment is carried out.

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Authors and Affiliations

  1. Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Head Post Office, P.O. Box 79, Moscow, USSR

    V. Yu. Yushankhai

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  1. V. Yu. Yushankhai
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Yushankhai, V.Y. On the investigation of magnetic critical phenomena in ferromagnets by μSR and PAC. Hyperfine Interact 50, 775–779 (1989). https://doi.org/10.1007/BF02407721

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