Published April 4, 1994
| Version v1
Journal article
Local octahedral tilts in La2-xBaxCuO4: Evidence for a new structural length scale
- 1. Department of Applied Physics, University of Tokyo, Yayoi 2 11 16, Bunkyo-ku, Tokyo 113 (Japan)
- 2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Description
The short-range structure in La2-xBaxCuO4 is examined by obtaining the pair distribution function from neutron powder diffraction data. In contrast to the predictions of the crystal structure models, locally, the CuO6 octahedra do not change their tilt direction at the low-temperature tetragonal (LTT) to low-temperature orthorhombic (LTO) phase transition: they always tilt in the [110] (LTT) directions. The long-range structures of the high-temperature phases result from coherent superpositions of the local LTT variants. The local tilt order extends over ∼1 nm. We discuss the implications of this local structure for the properties
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 72
- Journal Issue
- 14
- Journal Page Range
- p. 2282-2285.
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25057805
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; CRYSTAL-PHASE TRANSFORMATIONS; DATA ANALYSIS; HIGH-TC SUPERCONDUCTORS; LANTHANUM OXIDES; NEUTRON DIFFRACTION; TEMPERATURE DEPENDENCE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RARE EARTH COMPOUNDS; SCATTERING; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS