Structural properties of the superconductor LaBa sub 2 Cu sub 3 minus y O sub 7 minus z in the solid solution system La sub 1+ x Ba sub 2 minus x Cu sub 3 minus y O sub 7 minus z

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.6771· OSTI ID:5486675

Izumi, M ^[1]; Yabe, T; Wada, T; Maeda, A; Uchinokura, K; Tanaka, S ^[2]; Asano, H ^[3]

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1. Department of Physics, Tokyo University of Mercantile Marine, 2-1-6, Etchu-jima, Koto-ku, Tokyo 135, Japan (JP)
2. Department of Applied Physics, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113, Japan
3. Institute of Materials Science, University of Tsukuba, Tennodai, Tsukuba, Ibaraki 305, Japan

We present time-of-flight (TOF) neutron-powder-diffraction results of four samples in the solid-solution orthorhombic La{sub 1+{ital x}}Ba{sub 2{minus}{ital x}}Cu{sub 3{minus}{ital y}}O{sub 7{minus}{ital z}} system. The data for all of the samples were taken at room temperature. The average crystal structures of LaBa{sub 2}Cu{sub 2.90}O{sub 6.82} ({ital T}{sub {ital c}}=45 K), La{sub 1.56}Ba{sub 1.44}Cu{sub 2.86}BO{sub 6.98} (nonsuperconductor), and the impurity-free LaBa{sub 2}Cu{sub 3}O{sub 6.85} ({ital T}{sub {ital c}}=93 K) were refined by the Rietveld analysis which includes the refinement of the occupancies of the La and/or Ba atoms. The remaining sample was imhomogeneous LaBa{sub 2}Cu{sub 3{minus}{ital y}}O{sub 7{minus}{ital z}} ({ital T}{sub {ital c}}=85 K).

• OSTI ID: 5486675
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Journal Issue: 10 Vol. 40:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEUTRON DIFFRACTION
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDERS
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS