Giant Piezocaloric Effect in PZT Ceramic Film

Abstract

The paper focuses on the analysis of the multicaloric effect in solids. In particular, the presented approach is applicable to thin films as well. For the piezoelectric material, the multicaloric phenomenon includes two well-known effects: electro and elastocaloric; and two new ones - piezoelectocaloric and flexocaloric. These new effects are due to the temperature dependence of the piezoelectric and flexoelectric coefficients. The piezoelectric effect at medium fields is found to be comparable with the electrocaloric one and can be called a giant. The obtained results can be used for the design and optimization of new cooling devices and generators.

Keywords:

• Multicaloric effect
• piezoelectric film
• thermodynamic approach

Funding

This work was financially supported by the Government of Russian Federation, Grant 074-U01.