Cold neutron scattering study on diffuse and phonon excitations in the relaxor PbMg(1/3)Nb(2/3)O3

Abstract

Cold neutron scattering experiments have been performed to explore the energy, temperature, and wave-vector dependence of the diffuse scattering and the transverse acoustic (TA) phonons in the relaxor PbMg(1/3)Nb(2/3)O3. We have observed a weak, but definitive, diffuse scattering cross section above the Burns temperature T_d ~ 600 K. This cross section, which is most likely caused by chemical short-range order, persists down to 100 K, and coexists with the much stronger diffuse scattering that is attributed to the polar nanoregions. A systematic study of the TA phonon around (1, 1, 0) has also been carried out. The phonon is well defined for small wave vectors q, but broadens markedly around q = (0.1, -0.1, 0).

7 pages, 8 figures, 3 tables

References in corpus (9)

• A Neutron Elastic Diffuse Scattering Study of PMN
• Neutron Diffuse Scattering from Polar Nanoregions in the Relaxor Pb(Mg1/3Nb2/3)O3
• Soft Mode Dynamics Above and Below the Burns Temperature in the Relaxor Pb(Mg_1/3Nb_2/3)O_3
• Ferroelectric Ordering in the Relaxor Pb(Mg1/3Nb2/3)O3 as Evidenced by Low-Temperature Phonon Anomalies
• Origin of the "Waterfall" Effect in Phonon Dispersion of Relaxor Perovskites
• Mode-coupling and polar nanoregions in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3
• Direct evidence of soft mode behavior near the Burns' temperature in PbMg${}_{1/3}$Nb${}_{2/3}$O${}_3$ (PMN) relaxor ferroectric
• X-Ray Diffuse Scattering Study on Ionic-Pair Displacement Correlations in Relaxor Lead Magnesium Niobate
• Disorder and relaxation mode in the lattice dynamics of PbMg${}_{1/3}$Nb${}_{2/3}$O${}_3$ relaxor ferroelectric

Cited by in corpus (28)

• 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
• Damped Soft Phonons and Diffuse Scattering in 40PMN-60PT
• Interplay between static and dynamic polar correlations in relaxor Pb(Mg_{1/3}Nb_{2/3})O_{3}
• Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor
• Neutron and X-ray diffraction study of cubic [111] field cooled Pb(Mg1/3Nb2/3)O3
• Origin of Diffuse Scattering in Relaxor Ferroelectrics
• Soft phonon columns on the edge of the Brillouin zone in the relaxor PbMg1/3Nb2/3O3
• Quasi-Elastic Scattering, Random Fields and phonon-coupling effects in PbMg1/3Nb2/3O3
• The Persistence and Memory of Polar Nano-Regions in a Ferroelectric Relaxor Under an Electric Field
• Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics
• Paraelectric and Ferroelectric States in a Model for Relaxor Ferroelectrics
• Evidence for anisotropic polar nanoregions in relaxor PMN: A neutron study of the elastic constants and anomalous TA phonon damping
• 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
• Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3
• Evolution of the neutron quasi-elastic scattering through the ferroelectric phase transition in 93%PbZn${}_{1/3}$Nb${}_{2/3}$O${}_3$ - 7% PbTiO${}_3$
• Structure Factor of a Relaxor Ferroelectric
• Spontaneous decay of a soft optical phonon in the relaxor ferroelectric PbMg${}_{1/3}$Nb${}_{2/3}$O${}_3$
• Freezing of the local dynamics in the relaxor ferroelectric PZN-4.5PT
• Fluctuating defects in the incipient relaxor K${}_{1-x}$Li${}_x$TaO${}_3$ (x=0.02)
• The effect of local dipole moments on the structure and lattice dynamics of K0.98Li0.02TaO3
• Relaxation of dynamically disordered tetragonal platelets in the relaxor ferroelectric $0.964{\mathrm{Na}}_{1/2}{\mathrm{Bi}}_{1/2}{\mathrm{TiO}}_3-0.036{\mathrm{BaTiO}}_3$
• Electric field effect on short-range polar orders in a relaxor ferroelectric system
• Broadband critical dynamics in disordered lead-based perovskites
• Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary
• Fast broadband cluster spin-glass dynamics in PbFe${}_{1/2}$Nb${}_{1/2}$O${}_3$
• Soft Phonon Modes and Diffuse Scattering in Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 Relaxor Ferroelectrics