Combined Real-Time Study of Dielectric Response and Piezoresponse of Pb(Mg1/3Nb2/3)O3 Relaxor in an Electric Field

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A method of synchronous measurement of the piezoresponse signal and electrical impedance when studying the processes of polarization switching in an external electric field has been described. Using the developed technique, the processes of switching ferroelectric (FE) phase of lead magnoniobate induced by an electric field are studied. It is shown that a polydomain structure with a weak piezoresponse is formed during the initial appearance of the FE phase. A change in the direction of the external field leads to polarization switching, and the switching process passes through an intermediate glass-like phase. Training the sample by multiple switching leads to a sharp increase in piezoresponse, which can be associated with a single-domain state formation.