Abstract
Recent measurements of the specific heats of single crystals of magnetic salts are compared with theoretical calculations on the high temperature side of the Curie point for the Ising and classical Heisenberg models. It is found that there is an anomalous rise of specific heat when (T/Tc−1) similar, equals 10−3. This is interpreted as arising from coupling between the magnetic interaction and compressibility of the lattice.
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