Abstract
Multicomponent ceramics based on PbMg1/3Nb2/3O3–PbTiO3 system were studied using X-ray diffraction at high electric fields. It was shown that electric field induced phase transition from initial pseudocubic phase to tetragonal one occurs at E > 5 kV/cm. Analysis of the intensities of the 200 X-ray peak components reveals the parameters of the tetragonal unit cell (с = 4.036 Å and а = 4.021 Å) and the degree of preferential domain orientation (≈ 35%) at E = 12 kV/cm. The results of X-ray diffraction studies are in a good agreement with the field-induced behavior of the macroscopic responses: strain, polarization, and dielectric permittivity.
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