Published June 5, 1989
| Version v1
Journal article
Structural phase transformations and superconductivity in La/sub 2-x/Ba/sub x/CuO4
Creators
- 1. Brookhaven National Laboratory, Upton, New York 11973 (USA)
Description
La/sub 2-x/Ba/sub x/CuO4 has been found to undergo the following sequence of transformations upon cooling: tetr.(I4/mmm) yields ortho.(Bmab) yields tetr.(P42/ncm), over a range of composition 0.05<x<0.20. The newly discovered low-temperature tetragonal phase can be thought of as a coherent superposition of the twin-related Bmab structures. The system can be modeled as an XY-spin system with temperature-dependent quartic anisotopy, v(T). Slight differences between orthorhombic and tetragonal structures appear to have large effects upon the superconductivity
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 62
- Journal Issue
- 23
- Series
- Phys. Rev. Lett.
- Journal Page Range
- 2751-2754
- ISSN
- 0031-9007
- CODEN
- PRLTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20084002
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM COMPOUNDS; CHEMICAL COMPOSITION; COOLING; COPPER OXIDES; CRYSTAL-PHASE TRANSFORMATIONS; LANTHANUM COMPOUNDS; MATHEMATICAL MODELS; ORTHORHOMBIC LATTICES; SUPERCONDUCTIVITY; SUPERCONDUCTORS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; TRANSITION ELEMENT COMPOUNDS