Heat capacity and thermodynamic functions of new nanostructured cuprate-manganite NdCa2CuMnO6
Abstract
Heat capacities of nanostructured NdCa2CuMnO6 cuprate-manganite are measured by means of dynamic calorimetry on an IT-C-400 unit in the temperature interval of 298.15-673 K. It is established that a λ-shaped phase transition of the second kind is revealed at 348 K on the curve of the dependence C° p ∼ f( T) of NdCa2CuMnO6. Equations for the temperature dependence of the heat capacity of NdCa2CuMnO6 cuprate-manganite are derived from experimental data including the temperature of phase transition. Thermodynamic functions H°( T)- H°(298.15), S°( T), and Φ**( T) are calculated in the interval of 298.15-675 K.
- Publication:
-
Russian Journal of Physical Chemistry A
- Pub Date:
- October 2014
- DOI:
- 10.1134/S0036024414100197
- Bibcode:
- 2014RJPCA..88.1802K
- Keywords:
-
- cuprate-manganite;
- heat capacity;
- thermodynamic functions