Physics – Condensed Matter – Materials Science
Scientific paper
2010-04-29
Phys. Rev. B 82, 134124 (2010)
Physics
Condensed Matter
Materials Science
7 pages, 6 figures, 3 tables. submitted to Phys. Rev. B.
Scientific paper
10.1103/PhysRevB.82.134124
We report measurements of the neutron diffuse scattering in a single crystal of the relaxor ferroelectric material 95.5%Pb(Zn$_{1/3}$Nb$_{2/3}$)O$_3$-4.5%PbTiO$_3$ (PZN-4.5%PT). Our results suggest that the nanometer scale structure in this compound exhibits both $<100>$ and $<110>$ polarizations, which contribute to different portions of the total diffuse scattering intensity. These contributions can be distinguished by the differing responses to an electric field applied along [001]. While diffuse scattering intensities associated with $<110>$ (T2-type) polarizations show little to no change in a [001] field, those associated with $<100>$ (T1-type) polarizations are partially suppressed by the field at temperatures below the Curie temperature \emph{T$_C$} $\sim 475$ K. Neutron spin-echo measurements show that the diffuse scattering at (0.05,0,1) is largely dynamic at high temperature and gradually freezes on cooling, becoming mostly static at 200 K.
Gardner Starkie J.
Gehring Peter M.
Stock Chris
Wen Jinsheng
Xu Guangyong
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