Reverse thermopolarization effects in dielectrics

The reverse thermopolarization effect in dielectrics manifested by a appearance of a temperature difference δ between the opposite sides of charging and discharging capacitors was observed. A capacitor of PbMg_1/3Nb_2/3O₃ (PMN) crystals was charged by applying an electric field of E = 10⁶V/m with a time constant. ≃ 10^-5s. The temperature difference δ amounted ≃ 10^-4K at 293 K. The thermal and electric field dependencies of this effect were investigated too. The analysis of the generalized Peltier effect at the boundary of two arbitrary materials shows that the experimental results can be considered as a “dielectric Peltier effect”.