Two-component model of the neutron diffuse scattering in the relaxor ferroelectric PZN-4.5%PT

Zhijun Xu, Jinsheng Wen, Guangyong Xu, C. Stock, J. S. Gardner, P. M. Gehring

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Abstract

We report measurements of the neutron diffuse scattering in a single crystal of the relaxor ferroelectric material 95.5%Pb (Zn1/3Nb 2/3)O3-4.5%PbTiO3. 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 TC ∼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.

Original languageEnglish
Article number134124
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number13
DOIs
StatePublished - Oct 28 2010
Externally publishedYes

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