Specific heat and phonon density of state of cubic phase of protonic conductor LaAlO₃

Perovskite oxides find wide range of applications like oxygen sensors, catalyst support, high frequency capacitors, high temperature superconducting microwave devices, solid state oxide fuel cell (SOFC) etc. LaAlO₃ is one of such type of prominent perovskite oxides and very prominent material for protonic conductions. Therefore knowledge of the thermal properties of LaAlO₃ is most significant. Hence in the present study we have studied phonon density of states and specific heat of LaAlO₃ in cubic structure by applying lattice dynamical theoretical model. The calculated results are interpreted with existing experimental or theoretical results.