Temperature Dependence of the Specific Heat of Pr_1-xTb_xCoO₃(0 ≤ × ≤1)

In the present work, the specific heat of the perovskite-type rare earth cobalt oxide Pr_1-xTb_x CoO₃(0 ≤ × ≤ 1) has been investigated for the first time using extended rigid ion model (ERIM) after improving modified rigid ion model developed by Renu Choithrani et al. Our computed specific heat values with temperature and the corresponding experimental data by H. Hashimoto et al show same trend of variation for almost all the compositions (x) of Pr_1-xTb_x CoO₃ with minor deviations at higher temperatures. The system exhibits cubic phase for x = 0 and 0.25 while orthorhombic phase above 0.5, results in the distortion of CoO₆ octahedron. In addition, we have used ERIM to compute the thermodynamical pproperties whose results are discussed in detail for the present system of cobalt oxides and found in good agreement with the available experimental results.