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

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

2009-07-16

arxiv.org/abs/0907.2913v1

Physics

Condensed Matter

Materials Science

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

Scientific paper

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.

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