https://doi.org/10.1140/epjb/s10051-021-00120-z
Regular Article - Solid State and Materials
Elastic and thermodynamic properties of cubic perovskite type 
(X=Ga, In)
Department of Environmental Protection Technologies, Vocational School, Izmir Democracy University, 35140, Izmir, Turkey
Received:
10
March
2021
Accepted:
12
May
2021
Published online:
22
May
2021
The elastic and thermodynamic properties of 
and 
with the space group Pm
m (no. 221) are studied for the first-time using density functional theory. The computed equilibrium lattice constants at stable phase are found to be 3.89 and 4.14 Å which are in a good agreement with literature. Elastic constants are computed to evaluate mechanical behaviours of materials. By applying Born stability criteria for elastic constants, it is found that both materials are mechanically stable. Moreover, bulk and shear modulus, Poisson’ ratio, Cauchy pressures, and Young modulus are examined. Ductile and brittle behaviour analysis indicates that both materials are ductile in nature. The thermodynamic properties such as thermal expansion coefficient, Grüneisen parameter, bulk modulus, specific heat capacities, and entropy are computed at a temperature range of 0–1000 K. The calculated elastic and thermodynamic properties can serve as a reference for future investigations as some of these physical properties can be difficult to determine experimentally.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
