Electric field and aging effects of uniaxial ferroelectrics Sr _x Ba_1-x Nb₂O₆ probed by Brillouin scattering.

ABSTRACT: Static and dynamic heterogeneity of disordered system is one of the current topics in materials science. In disordered ferroelectric materials with random fields, dynamic polar nanoregions (PNRs) appear at Burns temperature and freeze into nanodomain state below Curie temperature (T _C). This state is very sensitive to external electric field and aging by which it gradually switches into macrodomain state. However, the role of PNRs in such states below T _C is still a puzzling issue of materials science. Electric field and aging effects of uniaxial ferroelectric Sr _x Ba_1-x Nb₂O₆ (x = 0.40, SBN40) single crystals were studied using Brillouin scattering to clarify the critical nature of PNRs in domain states below T _C

SUBMITTER: Aftabuzzaman M 

PROVIDER: S-EPMC5599614 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature