A. A. Semenov, O. V. Pakhomov, P. Yu. Belyavskii, A. V. Es'kov, S. F. Karmanenko, A. A. Nikitin, “Analysis of the dynamics of electrocaloric response in ferroelectrics using a ferromagnetic resonator”, Zhurnal Tekhnicheskoi Fiziki, 2012, Volume 82, Issue 1,Pages <nobr>59

Solids

Analysis of the dynamics of electrocaloric response in ferroelectrics using a ferromagnetic resonator

A. A. Semenov^a, O. V. Pakhomov^b, P. Yu. Belyavskii^a, A. V. Es'kov^a, S. F. Karmanenko^a, A. A. Nikitin^a

^a Saint Petersburg Electrotechnical University "LETI"
^b St. Petersburg State University of Low Temperature and Food Technologies

Abstract: A method is proposed for studying the dynamics of the electrocaloric response of a ferroelectric capacitor to the pulsed action of the electric field, and the results of measurements are reported. The temperature of the capacitor was measured with the help of a ferromagnetic film resonator. The sensitivity of temperature measurements was $\sim$10$^{-4}$ K/kHz. The recalculated temperature dependence of the resonance frequency showed that the ferroelectric ceramic sample was heated by 0.065 K and was cooled by 0.041 K relative to the thermostat temperature under the action of high-voltage pulses. The relaxation time of the electrocaloric effect of the 0.87PMN-0.13PT relaxor ferroelectric ceramic is 4.5 $\mu$s.

Received: 28.04.2011