Phase transitions and superconductivity of Sr-substituted La2-xBaxCuO4 (x=0.125)
Creators
- 1. Japan Atomic Energy Res. Inst., Ibaraki (Japan). Dept. of Mater. Sci. and Eng.
- 2. Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106 (Japan)
Description
Neutron diffraction and magnetic susceptibility measurements have been performed to study the correlations between structural phase transitions and superconductivity in Sr-substituted La2-xBaxCuO4 with x=0.125: La2-xBax-ySryCuO4 with y from 0 to 0.105. The crystal structure at low temperature changes drastically with Sr substitution; that is, the structure transforms from tetragonal P42/ncm (LTT) to orthorhombic Pccn, and then to orthorhombic Cmca (LTO) with increasing y. Corresponding to this stabilization of the LTO structure, the bulk superconducting transition temperature Tc is greatly enhanced. Crystal parameters and bond lengths obtained by profile analysis decrease monotonically as a function of y. A large reduction in the bond length of the Cu-apical O bond is noted for the increase in Tc. (orig.)
Additional details
Publishing Information
- Journal Title
- Physica. B, Condensed Matter
- Journal Volume
- 213-214
- Journal Issue
- 1-4
- Journal Page Range
- p. 81-83.
- ISSN
- 0921-4526
- CODEN
- PHYBE3
Conference
- Title
- 41. Yamada conference - the international conference on neutron scattering (ICNS-41).
- Dates
- 11-14 Oct 1994.
- Place
- Sendai (Japan).
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 27021674
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BOND LENGTHS; COPPER OXIDES; CRYSTAL STRUCTURE; HIGH-TC SUPERCONDUCTORS; LATTICE PARAMETERS; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; PHASE TRANSFORMATIONS; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL LATTICES; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MAGNETIC PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS