Abstract
We have investigated the specific heat and thermal expansion of La1−xEuxCoO3 (0.0 ⩽ x ⩽ 1.0) perovskite using a modified rigid ion model for the temperature range 1 K ⩽ T ⩽ 1000 K. The trends of variation in our computed specific heats and thermal expansion are in good agreement with corresponding experimental data for almost all the compositions (x). The specific heat is found to increase with temperature from 15 to 300 K, while it decreases with concentration (x) for these perovskite cobaltates. In addition, the results on the temperature dependence of the molecular force constant (f), Reststrahlen frequency (υ), cohesive energy (ϕ) and Debye temperature (θD) are also discussed.
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