Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics

Abstract

Neutron and x-ray scattering studies on relaxor ferroelectric systems Pb(Zn${}_{1/3}$Nb${}_{2/3}$)O${}_3$ (PZN), Pb(Mg${}_{1/3}$Nb${}_{2/3}$)O${}_3$ (PMN), and their solid solutions with PbTiO${}_3$ (PT) have shown that inhomogeneities and disorder play important roles in the materials properties. Although a long-range polar order can be established at low temperature - sometimes with the help of an external electric field; short-range local structures called the ``polar nano-regions'' (PNR) still persist. Both the bulk structure and the PNR have been studied in details. The coexistence and competition of long- and short-range polar orders and how they affect the structural and dynamical properties of relaxor materials are discussed.

Article submitted for JPSJ Special Topics (Novel States of Matter Induced by Frustration)

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Cited by in corpus (4)

• Interplay between static and dynamic polar correlations in relaxor Pb(Mg_{1/3}Nb_{2/3})O_{3}
• A two-component model of the neutron diffuse scattering in the relaxor ferroelectric PZN-4.5%PT
• Electric field effect on short-range polar orders in a relaxor ferroelectric system
• Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary