Аңдатпа
The isobaric heat capacities of nanostructured manganese ferrites NdMe1.5MnFeO6, where Me is Mg, Ca, Sr, and Ba, are investigated at ΔT ranging from 298.15 to 673 K by means of dynamic calorimetry. It is established that all of the investigated compounds exhibit λ-shape anomalies on dependence graphs C p ° ∼ (T) that could be due to second-order phase transitions. Dependence equations C p ° ∼ (T) are derived with allowance for the temperatures of phase transitions and the temperature dependences of their thermodynamic functions S°(T), H°(T) − H°(298.15), and Φ xx (T) are calculated for the temperature range of 298.15 to 675 K.