The role of the secondary pyroelectric effect in a ferroelectric relaxor 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3
The depth profile of the pyroelectric coefficient effective values of a 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-0.28PT) single crystal is studied. It was shown that owing to high pyroelectric coefficients the secondary pyroelectric effect significally contributes (∼40%) to the total pyroelectric coefficient.