Abstract
We develop a theoretical model for quantitative analysis of temperature-dependent heat capacity calculation of the magnetoresistance compounds LaMnO3 and La0.67Ca0.33MnO3. The results on heat capacity obtained by us are in good agreement with the measured values. An effective interionic interaction potential (EIoIP) with the long-range Coulomb, van der Waals (vdW) interaction and short-range repulsive interaction up to second neighbor ions within the Hafemeister and Flygare approach was formulated to estimate the Debye and Einstein temperature and was found to be consistent with the available experimental data. In addition, we have reported cohesive energy (U) and force constant (κ).
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