Structural properties of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus. delta

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.1863· OSTI ID:7009242

Jorgensen, J D; Veal, B W; Paulikas, A P; Nowicki, L J; Crabtree, G W; Claus, H; Kwok, W K ^[1]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (US)

The structural properties of oxygen-deficient YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} have been determined by neutron powder diffraction for 0.07{lt}{delta}{lt}0.91. The samples were produced by quenching into liquid nitrogen from controlled oxygen partial pressures at 520 {degree}C, and they exhibit a clearly defined plateau'' behavior of {ital T}{sub {ital c}} versus {delta}. Superconductivity disappears at the orthorhombic-to-tetragonal transition that occurs near {delta}=0.65. Structural parameters, including the copper-oxygen bond lengths, vary smoothly with {delta} within each phase but exhibit different behavior in the superconducting and nonsuperconducting phases. These observations are consistent with a model in which superconducting behavior is controlled by charge transfer between the conducting two-dimensional CuO{sub 2} planes and the CuO{sub {ital x}} chains, which act as reservoirs of charge.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7009242
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:4; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHARGE EXCHANGE
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
MINERALS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
PHYSICAL PROPERTIES
STOICHIOMETRY
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VALENCE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES