The role of oxygen in YBa/sub 2/Cu/sub 3/O/sub 7-/delta//

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Int. J. Mod. Phys. B; (United States)

DOI:https://doi.org/10.1142/S0217979288000251· OSTI ID:5616543

Goodenough, J B; Manthiram, A

Five observations concerning the role of oxygen in the high-T/sub c/ superconductors YBa/sub 2/Cu/sub 3/O/sub 7-/delta// are emphasized; (1) An internal electric field parallel to the c-axis constrains the redox reactions associated with the intercalation/disintercalation of oxygen primarily to the (CuO/sub 3-/delta//)/sup 3-/ layers located between Ba/sup 2+/ layers. (2) Intercalation of O/sup 2-/ into the tetragonal YBa/sub 2/Cu/sub 3/O/sub 6/ phase results in an ordering onto one of the basal-plane axes of the Cu layer, the b-axis of the orthorhombic phase. (3) Ordering between and within b-axis chains gives rise to discrete phases predicted to occur at O/sub 6.875/, O/sub 6.75/, O/sub 6.5/, O/sub 6.25/, and O/sub 6.125/. (4) An equilibrium oxidation state for the intercalation layer depends not only on the oxygen partial pressure and temperature, but also on the cations of the structure. (5) At higher oxidation states of the intercalation layer, any oxygen atom on the a-axis interacts with a near-neighbor oxygen on the b-axis to trap out holes in a peroxide ion (O/sub 2/)/sup 2-/.

• Research Organization: Texas Univ., Austin, TX (USA). Center for Materials Science and Engineering
• OSTI ID: 5616543
• Journal Information: Int. J. Mod. Phys. B; (United States), Journal Name: Int. J. Mod. Phys. B; (United States) Vol. 2:3; ISSN IJPBE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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Cermets
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Cermets
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656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRON-HOLE COUPLING
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HIGH TEMPERATURE
HOLES
KINETICS
LEPTONS
NONMETALS
ORTHORHOMBIC LATTICES
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHYSICAL PROPERTIES
REACTION KINETICS
REDOX REACTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
TRAPPING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES