Emergence of high piezoelectricity from competing local polar order-disorder in relaxor ferroelectrics.

ABSTRACT: Relaxor ferroelectrics are known for outstanding piezoelectric properties, finding a broad range of applications in advanced electromechanical devices. Decoding the origins of the enhanced properties, however, have long been complicated by the heterogeneous local structures. Here, we employ the advanced big-box refinement method by fitting neutron-, X-ray-based total scattering, and X-ray absorption spectrum simultaneously, to extract local atomic polar displacements and construct 3D polar configurations in the classical relaxor ferroelectric Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃. Our results demonstrate that prevailing order-disorder character accompanied by the continuous rotation of local polar displacements commands the composition-driven global structure

SUBMITTER: Liu H 

PROVIDER: S-EPMC9950361 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature