Electric field induced phase transition in multicomponent ceramics based on PbMg_1/3Nb_2/3O₃–PbTiO₃

Abstract

Multicomponent ceramics based on PbMg_1/3Nb_2/3O₃–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.

Keywords:

• Relaxor ferroelectrics
• phase transition
• electric field

Additional information

Funding

This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (State task in the field of scientific activity) under Scientific Project No. 0852-2020-0032, BAZ0110/20-3-08IF).