THE ELASTIC AND THERMODYNAMIC PROPERTIES OF Lu DOPED ScVO₃

Abstract

We have investigated the elastic, cohesive and thermal properties of (Lu, Sc) VO 3 and Sc 1−x LuxVO 3 (0.6 ≤ x ≤ 0.9) perovskites by means of a modified rigid ion model (MRIM). The variation of specific heat is determined following the temperature driven structural phase transitions. Also, the effect of lattice distortions on the elastic and thermal properties of the present pure and doped vanadates has been studied by an atomistic approach. The calculated bulk modulus (B T ), reststrahlen frequency (ν 0 ), cohesive energy (φ), Debye temperature (θ D ) and Gruneisen parameter (γ) reproduce well with the corresponding experimental data. The specific heat results can further be improved by including the magnetic ordering contributions to the specific heat. Int. J. Mod. Phys. B 2012.26. Downloaded from www.worldscientific.com by MCGILL UNIVERSITY on 02/03/15. For personal use only. 1250190-2 Int. J. Mod. Phys. B 2012.26. Downloaded from www.worldscientific.com by MCGILL UNIVERSITY on 02/03/15. For personal use only.