Full text loading...
D-E loops for a typical pyroelectric material at temperatures and and the Olsen cycle performed under quasiequilibrium conditions. is represented by the gray area enclosed by 1-4.
Isothermal bipolar D-E loops at T = 22, 90, and and experimental Olsen cycles at 0.0173 and 0.0211 Hz for PMN-28PT with , and .
Measured electric displacement vs. time during the Olsen cycles at 0.0211 and 0.0173 Hz, respectively. Here, , and .
Olsen cycles performed at 0.0173 and 0.0211 Hz in the E-T diagram and phase boundaries for -poled PMN-28PT (Ref. 11 ). The phase boundary (dashed lines) was not always observed. The shaded region corresponds to electrically induced ferroelectric state with polarizations smaller than that of the T phase (Ref. 16 ).
 PMN-28PT properties reported in the literature used in Eq. (3) to predict .
Article metrics loading...