Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor

Abstract

We have performed a series of neutron diffuse scattering measurements on a single crystal of the solid solution Pb(Zn${}_{1/3}$Nb${}_{2/3}$)O${}_3$ (PZN) doped with 8% PbTiO${}_3$ (PT), a relaxor compound with a Curie temperature T${}_C\sim 450$ K, in an effort to study the change in local polar orders from the polar nanoregions (PNR) when the material enters the ferroelectric phase. The diffuse scattering intensity increases monotonically upon cooling in zero field, while the rate of increase varies dramatically around different Bragg peaks. These results can be explained by assuming that corresponding changes occur in the ratio of the optic and acoustic components of the atomic displacements within the PNR. Cooling in the presence of a modest electric field $\vec{E}$ oriented along the [111] direction alters the shape of diffuse scattering in reciprocal space, but does not eliminate the scattering as would be expected in the case of a classic ferroelectric material. This suggests that a field-induced redistribution of the PNR has taken place.

References in corpus (13)

• Phase diagram of the ferroelectric-relaxor (1-x)PbMg(1/3)Nb(2/3)O3-xPbTiO3
• Direct observation of the formation of polar nanoregions in Pb(Mg${}_{1/3}$Nb${}_{2/3}$)O${}_3$ using neutron pair distribution function analysis
• Phase diagram of the relaxor ferroelectric (1-x)PbZn(1/3)Nb(2/3)O3-xPbTiO3
• A Neutron Elastic Diffuse Scattering Study of PMN
• Neutron Diffuse Scattering from Polar Nanoregions in the Relaxor Pb(Mg1/3Nb2/3)O3
• Development of Ferroelectric Order in Relaxor (1-x)Pb(Mg1/3Nb2/3)O3 - xPbTiO3
• Universal Static and Dynamic Properties of the Structural Transition in Pb(Zn1/3Nb2/3)O3
• Ground State of Relaxor Ferroelectric $Pb(Z{n}_{1/3}N{b}_{2/3})O_3$
• Cold neutron scattering study on diffuse and phonon excitations in the relaxor PbMg(1/3)Nb(2/3)O3
• An Anomalous Phase in the Relaxor Ferroelectric Pb(Zn${}_{1/3}$Nb${}_{2/3}$)O${}_3$
• X-Ray Diffuse Scattering Study on Ionic-Pair Displacement Correlations in Relaxor Lead Magnesium Niobate
• The Persistence and Memory of Polar Nano-Regions in a Ferroelectric Relaxor Under an Electric Field
• Electric Field Effects on the Diffuse Scattering in PZN-8%PT

Cited by in corpus (14)

• Phase instability induced by polar nanoregions in a relaxor ferroelectric system
• A reassessment of the Burns temperature and its relationship to the diffuse scattering, lattice dynamics, and thermal expansion in the relaxor PMN
• Interplay between static and dynamic polar correlations in relaxor Pb(Mg_{1/3}Nb_{2/3})O_{3}
• Neutron and X-ray diffraction study of cubic [111] field cooled Pb(Mg1/3Nb2/3)O3
• Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics
• In-plane Dielectric and Magnetoelectric Studies of BiFeO3
• A two-component model of the neutron diffuse scattering in the relaxor ferroelectric PZN-4.5%PT
• Response of polar nanoregions in 68%Pb(Mg1/3Nb2/3)O3-32%PbTiO3 to a [001] electric field
• Polaron-mediated spin correlations in metallic and insulating La${}_{1-x}{A}_x$MnO${}_3$ ($A$=Ca, Sr, or Ba)
• Freezing of the local dynamics in the relaxor ferroelectric PZN-4.5PT
• Electric field effect on short-range polar orders in a relaxor ferroelectric system
• Raman spectroscopic investigation of relaxor behavior in Pr doped SrTiO3 and Origin of Fano resonance
• Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary
• Field-Induced Ferroelectric Phase Transition Dynamics in PMN-PT compositions near the Morphotropic Phase Boundary