Why does high T sub c sometimes depend on oxidation; An investigation of Madelung Potentials

Journal Article · Sat Mar 10 00:00:00 EST 1990 · International Journal of Modern Physics B; (United States)

DOI:https://doi.org/10.1142/S0217979290000255· OSTI ID:5052804

Tan, N X; Bourdillon, A J ^[1]

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1. Dept. of Materials Science and Engineering, StatE Univ. of New York at Stony Brook, Stony Brook, NY (US)

Some high temperature superconductors require atmospheres of oxygen for the formation of the superconducting phase, and others do not. The former corrode more easily and includes the doped compound (La{sub 1.5}Ba{sub 0.5}) CuO{sub 4}. In the latter class, Cu ions inhabit sites with large ionic potential, which apparently allows the formation of high charge states such as Cu(d8) or CuO{sup +}. In this paper an elementary code was used to examine potentials on a number of defect sites. Thus a high charge state on polyvalent Cu is a feature common to both types of superconductors.

• OSTI ID: 5052804
• Journal Information: International Journal of Modern Physics B; (United States), Vol. 4:3; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
OXIDATION
COPPER OXIDES
LANTHANUM OXIDES
CHARGE STATE
COMPUTER CODES
COPPER IONS
CORROSION
CRYSTAL DEFECTS
HIGH-TC SUPERCONDUCTORS
POTENTIALS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
COPPER COMPOUNDS
CRYSTAL STRUCTURE
IONS
LANTHANUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity