Crystal structure of 0.96(Na0.5Bi0.5TiO3)–0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns
Abstract
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 Pm3¯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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 08, 2012
- Source ID
- 10.1063/1.4759117
Entities
People
- C. R. Dela Cruz
- J. S. Forrester
- Jacob L. Jones
- T.-m. Usher
Organizations
- Army Research Office
- Oak Ridge National Laboratory
- United States Department of Energy
- University of Florida