Abstract
Time dependences of permittivity and optical transmission in the Pb(Mg1/3Nb2/3)O3–xPb(Zr0.53Ti0.47)O3 (x = 16, 23, and 33%) transparent ferroelectric ceramics are studied in the electric fields of 0 < E< 6 kV/cm. It is shown that even in fields, which are less than the coercive field, a sharp decrease in the permittivity occurs in compounds with x equal to 16 and 23% in a short time, while these changes in the ceramics with x = 33% are significantly smaller and occur over a longer time. It is found that the stability of the phase induced in the field after its switching-off significantly depends on the composition of studied ceramics: the higher the x value is, the more stable the induced phase. The observed difference in the time dependences of permittivity and stability of the induced phase in ceramics with different composition is explained by different sizes of ferroelectric domains.
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