Thermodynamic and electrophysical properties of $\mathrm{LaSrMnFeO_{5,5}}$ ferrite

The isobaric heat capacity of $\mathrm{LaSrMnFeO_{5,5}}$ ferrite is investigated within the temperature range of $298.15$–$673$ K by a calorimetric method. On the curve of the dependence of the heat capacity on temperature, the $\lambda$-type effect is revealed relating to a phase transition of the second kind. Temperature dependencies of the thermodynamic functions $S^0(T)$, $H^0(T)-H^0(298.15)$, and $\Phi^{xx}(T)$ are calculated. The temperature dependencies of permittivity and electrical resistance are studied within the temperature range of $303$–$493$ K, and the results show that the composition under study has semiconductor properties.