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Title: Crystal structure of 0.96(Na 0.5Bi 0.5TiO 3)-0.04(BaTiO 3) from combined refinement of x-ray and neutron diffraction patterns

Abstract

High-resolution x-ray and neutron diffraction of (0.96)Na 0.5Bi 0.5TiO 3–(0.04)BaTiO 3 (NBT-4BT) reveal subtle structural distortions that evidence lower symmetry than allowed in the R3c space group. The combined refinement that best models the diffraction patterns is a two phase mixture of a monoclinic Cc phase and a minor fraction of a metrically cubic Pm 3¯ m phase (13 wt. %). The cubic phase is utilized to account for nanometer-scale regions whose local deviations from the long-range symmetry are not observed, such as polar nano-regions or tetragonal platelets. This suggests that the low symmetry found in the NBT-rich phases extends from 0 at. % to at least 4 at. % BT.

Authors:
; ; ;  [1]
  1. ORNL
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
U.S. ARMY RESEARCH
OSTI Identifier:
1059538
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 101; Journal Issue: 15; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Usher, T -M, Forrester, J S, dela Cruz, C R, Jones, J L, and Florida). Crystal structure of 0.96(Na0.5Bi0.5TiO3)-0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns. United States: N. p., 2012. Web. doi:10.1063/1.4759117.
Usher, T -M, Forrester, J S, dela Cruz, C R, Jones, J L, & Florida). Crystal structure of 0.96(Na0.5Bi0.5TiO3)-0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns. United States. https://doi.org/10.1063/1.4759117
Usher, T -M, Forrester, J S, dela Cruz, C R, Jones, J L, and Florida). Fri . "Crystal structure of 0.96(Na0.5Bi0.5TiO3)-0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns". United States. https://doi.org/10.1063/1.4759117.
@article{osti_1059538,
title = {Crystal structure of 0.96(Na0.5Bi0.5TiO3)-0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns},
author = {Usher, T -M and Forrester, J S and dela Cruz, C R and Jones, J L and Florida)},
abstractNote = {High-resolution x-ray and neutron diffraction of (0.96)Na0.5Bi0.5TiO3–(0.04)BaTiO3 (NBT-4BT) reveal subtle structural distortions that evidence lower symmetry than allowed in the R3c space group. The combined refinement that best models the diffraction patterns is a two phase mixture of a monoclinic Cc phase and a minor fraction of a metrically cubic Pm 3¯ m phase (13 wt. %). The cubic phase is utilized to account for nanometer-scale regions whose local deviations from the long-range symmetry are not observed, such as polar nano-regions or tetragonal platelets. This suggests that the low symmetry found in the NBT-rich phases extends from 0 at. % to at least 4 at. % BT.},
doi = {10.1063/1.4759117},
url = {https://www.osti.gov/biblio/1059538}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 15,
volume = 101,
place = {United States},
year = {2012},
month = {10}
}