Pressure dependence of dielectric constant, elastic constants, and lattice parameters of the Y3(Ga,Al)5O12 host

•Simulations are used to investigate the physical properties of Y3(GaxAl5-x)O12 host.•The lattice and physical properties were linearly dependent on the pressure.•The properties were affected by the Ga concentration in the Y3Al5O12 host.•A change of behavior on all quantities is found when the Ga concentration changes.

Atomistic simulations were performed to investigate the lattice parameters, dielectric constant, and elastic constants of Y3(GaxAl5−x)O12 (x = 1, 2, 3, 4, 5) structures. The calculated lattice parameters and elastic constants are in good agreement with those in available experimental results. The pressure dependence of all studied quantities was investigated. In general, a change in the behavior of all studied quantities is found when the Ga concentration becomes more than that of the aluminum (Al) in Y3(GaxAl5−x)O12 (x = 1, 2, 3, 4, 5) structures.