Piezocaloric and multicaloric effect in the KH₂PO₄ type ferroelectrics

ABSTRACT

Using the proton ordering model modified by taking into account the dependence of the dipole moments on the order parameter, we explore the piezocaloric and multicaloric effects in the KH₂PO₄ type ferroelectrics, caused by the shear stress σ₆ and longitudinal electric field E₃. The multicaloric effect is shown to be stronger than either electrocaloric or piezocaloric effects, especially at temperatures far from the phase transition.

KEYWORDS:

• Ferroelectrics
• ferroelastics
• cluster approximation
• piezocaloric effect