Published 1994
| Version v1
Journal article
Electrochemical oxidation of La2CuO4. Phase equilibria among superconductors
- 1. Inst. de Ciencia de Materials de Barcelona, C.S.I.C., Barcelona (Spain)
Description
Electrochemical oxidation of La2CuO4 in aqueous OH- yield superconducting materials with Tc values that depend on the degree of oxidation and the temperature. The chemical nature of the charge carriers changes with temperature, yielding notable changes in Tc values. For the maximum oxidation of 0.15 holes per copper, an internal redistribution of holes between Cu and O is proposed from RT to 100 C. Partial derivatives of magnetic susceptibility vs susceptibility show the existence of several coexisting phases with distinct Tc's, possibly within each grain. (orig.)
Additional details
Publishing Information
- Journal Title
- Materials Science Forum
- Journal Volume
- 152-153
- Journal Page Range
- p. 193-196.
- ISSN
- 0255-5476
- CODEN
- MSFOEP
Conference
- Title
- Routes to new materials.
- Acronym
- International symposium on soft chemistry
- Dates
- 6-10 Sep 1993.
- Place
- Nantes (France).
INIS
- Country of Publication
- Switzerland
- Country of Input or Organization
- Switzerland
- INIS RN
- 26014032
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AQUEOUS SOLUTIONS; CHARGE CARRIERS; CHEMICAL PREPARATION; COPPER OXIDES; ELECTROCHEMISTRY; GRAIN BOUNDARIES; HIGH-TC SUPERCONDUCTORS; LANTHANUM OXIDES; OXIDATION; PHASE DIAGRAMS; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL STRUCTURE; DIAGRAMS; DIFFRACTION; DISPERSIONS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; HOMOGENEOUS MIXTURES; INFORMATION; LANTHANUM COMPOUNDS; MICROSTRUCTURE; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; SOLUTIONS; SUPERCONDUCTORS; SYNTHESIS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS