Abstract
We have investigated the bulk modulus and thermal properties of orthovanadates RVO3 (R=La, Ce, Pr, Nd) probably for the first time in both monoclinic and orthorhombic phase by incorporating the effect of lattice distortions using the Modified Rigid ion model (MRIM). The calculated bulk modulus, specific heat and other thermal properties reproduce well with the available experimental data, implying that MRIM represents properly the nature of the perovskite type vanadates. The specific heat results can further be improved by including the spin and orbital ordering contributions to the specific heat.
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