Electric-field effects on the diffuse scattering inPbZn1∕3Nb2∕3O3doped with 8%PbTiO3

2003/07/27 by P. M. Gehring, K. Ohwada, G. Shirane
Materials Science · Physics and Astronomy · #Ferroelectric and Piezoelectric Materials #Photorefractive and Nonlinear Optics #Solid-state spectroscopy and crystallography #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.70.014110

published as Phys. Rev. B 70, 014110 (2004) . · 5 pages, 6 figures Revised Fig. 6

arxiv created 2003/07/27 · openalex publication_date 2004/07/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report measurements of the neutron diffuse scattering from a single crystal of the relaxor ferroelectric PbZn_1∕3Nb_2∕3O₃ doped with 8% PbTiO₃ (PZN-8%PT) for temperatures 100\phantom\rule0.3em0exK\ensuremath\leqslantT\ensuremath\leqslant530\phantom\rule0.3em0exK and electric fields 0\phantom\rule0.3em0exkV∕cm\ensuremath\leqslantE\ensuremath\leqslant10\phantom\rule0.3em0exkV∕cm. The field-cooled diffuse scattering measured transverse to the (003) Bragg peak is strongly suppressed in the tetragonal phase at 400\phantom\rule0.3em0exK for E=2\phantom\rule0.3em0exkV∕cm applied along the [001] direction. However, no change is observed in the diffuse scattering measured transverse to (300), even for field strengths up to 10\phantom\rule0.3em0exkV∕cm. Thus the application of an external electric field in the tetragonal (ferroelectric) phase of PZN-8%PT does not produce a uniformly polarized state. This unusal behavior can be understood within the context of the model of Hirota et al. of phase-shifted polar nanoregions in relaxors, since an electric field applied along [001] below T_c would reduce the shifts of the nanoregions along [001] while preserving those along the orthogonal [100] direction.

Citations

• Soft Mode Dynamics Above and Below the Burns Temperature in the Relaxor Pb(Mg₁/3Nb₂/3)O₃