Abstract
The critical behaviour of uniaxial ferromagnets is studied by an anisotropic renormalization transformation. For dimensionalityd smaller than the critical dimensionalityd c (d u ), which depends on the dimensionality of the uniaxial directiond u , the critical exponents are computed by theε-expansion. The critical dynamics is based on a timedependent Ginzburg Landau model, for a non-conserved and for a conserved order parameter. For the experimentally relevant cased=3 andd u =1 the logarithmic corrections in the frequency dependent susceptibility are computed.
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Work supported by the Fonds zur Förderung der wissenschaftlichen Forschung
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Folk, R., Iro, H. & Schwabl, F. Critical dynamics and statics of uniaxial dipolar magnets. Z Physik B 27, 169–175 (1977). https://doi.org/10.1007/BF01313606
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DOI: https://doi.org/10.1007/BF01313606