Heat capacity of EuMnO3 and Eu0.7A0.3MnO3 (A=Ca, Sr) compounds

We carried out the heat capacity calculation of the magnetoresistance compounds EuMnO3 and Eu0.7A0.3MnO3 (where A=Ca and Sr) as a function of temperature from 5 to 100 K, using the Rigid Ion Model (RIM). The results on heat capacity for EuMnO3 and Eu0.7A0.3MnO3 (A=Ca and Sr) obtained by us are in good agreement with the measured values. Although strong electron–phonon interactions are present in these compounds but the lattice part of the specific heat also deserves proper attention. The parent compound EuMnO3 exhibits two magnetic transitions at 35 and 47 K due to weak ferromagnetic (FM) component and antiferromagnetic (AF) ordering. In addition, we have reported cohesive energy (φ), molecular force constant (f), compressibility (β), Restrahalen frequency (υ0), Debye temperature (θD) and Gruneisen parameter (γ) in the temperature range 5 K⩽T⩽100 K.