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Title: 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{sub 1/3}Nb{sub 2/3})O{sub 3} doped with 8% PbTiO{sub 3}, a relaxor compound with a Curie temperature T{sub C}{approx}450 K, in an effort to study changes in local polar orders associated with the polar nanoregions (PNR) when the material enters the ferroelectric phase. The diffuse scattering intensity increases monotonically upon cooling in zero field, but 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 E(vector sign) 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.

Authors:
 [1];  [2];  [3]
  1. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  2. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
  3. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
20853620
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 74; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevB.74.104110; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC DISPLACEMENTS; BRAGG CURVE; COOLING; CURIE POINT; DIFFUSE SCATTERING; DOPED MATERIALS; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; LEAD COMPOUNDS; MONOCRYSTALS; NEUTRON DIFFRACTION; POLARIZATION; SOLID SOLUTIONS; TITANATES

Citation Formats

Guangyong, Xu, Gehring, P M, and Shirane, G. Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.74.104110.
Guangyong, Xu, Gehring, P M, & Shirane, G. Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor. United States. https://doi.org/10.1103/PHYSREVB.74.104110
Guangyong, Xu, Gehring, P M, and Shirane, G. Fri . "Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor". United States. https://doi.org/10.1103/PHYSREVB.74.104110.
@article{osti_20853620,
title = {Coexistence and competition of local- and long-range polar orders in a ferroelectric relaxor},
author = {Guangyong, Xu and Gehring, P M and Shirane, G},
abstractNote = {We have performed a series of neutron diffuse scattering measurements on a single crystal of the solid solution Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3} doped with 8% PbTiO{sub 3}, a relaxor compound with a Curie temperature T{sub C}{approx}450 K, in an effort to study changes in local polar orders associated with the polar nanoregions (PNR) when the material enters the ferroelectric phase. The diffuse scattering intensity increases monotonically upon cooling in zero field, but 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 E(vector sign) 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.},
doi = {10.1103/PHYSREVB.74.104110},
url = {https://www.osti.gov/biblio/20853620}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 10,
volume = 74,
place = {United States},
year = {2006},
month = {9}
}