Abstract
The temperature dependence of the magnetic contribution to the specific heat of the anisotropic reentrant ferromagnet Li0.475Co0.05Fe1.575Ga0.9O4 with freezing temperature T f =80 K is investigated. It is found that for both T<T f and T T f right up to T∼150 K the function C m (T) is described by the spin-wave law T 3/2, but an anomaly, exhibiting features which are characteristic for a first-order thermodynamic phase transition, is observed in C m (T 3/2) at T=T f .
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