Abstract
A comprehensive study and detailed analysis of pyroelectric and electrocaloric effects in relaxor ferroelectrics based on lead magnesium niobate as a promising object for such investigations have been carried out. It was found that even at the maximum values of pyroelectric coefficients the electrocaloric response inextricably linked with the pyroelectric effect does not exceed 1 °C in the temperature range from 10 to 60 °C under DC electric field up to 60 kV/cm. These conditions are the most demanded for the operation of electrocaloric cooling devices. Vision for the future as to increasing the efficiency of the main elements for such devices is discussed.
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