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The dynamic properties of paramagnets are investigated within a continued fraction representation of the relaxation shape function. The approach seeks to isolate the dominant frequency dependence and requires an estimation of the temperature dependence of static spin correlation functions. A three-pole approximation is shown on the basis of comparison with computer calculation and neutron scattering measurements on RbMnF 3 to provide a good description of the dynamic properties of one and three dimensional paramagnets over a wide range of wavevectors and temperature.
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Lovesey et al. (1973) studied this question.
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