Preparation of the oxide superconductors (La,Gd,Ba,Ce) sub 8 Cu sub 6 O sub z and (La,Gd,Ba,Sr,Ce) sub 8 Cu sub 6 O sub z

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

DOI:https://doi.org/10.1103/PhysRevB.41.1984· OSTI ID:7009241

Wada, T; Ichinose, A; Yaegashi, Y; Yamauchi, H; Tanaka, S ^[1]

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1. Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome 1-Chome, Koto-Ku, Tokyo 135, Japan (JP)

We have synthesized nearly single-phase ((Gd{sub 1{minus}{ital x}}La{sub {ital x}}){sub 1/2}Ba{sub 1/3}Ce{sub 16}){sub 8}CU{sub 6}O{sub {ital z}} ({ital x}=0, (1/3), (1/2)) and single-phase (La{sub 1/6}Gd{sub 1/3} (Ba{sub 1{minus}{ital y}}Sr{sub {ital y}}){sub 1/3} Ce{sub 1/6}){sub 8} Cu{sub 6}O{sub {ital z}} ({ital y} = (1/4), (1/2)). The x-ray-diffraction patterns were successfully indexed for tetragonal unit cells of approximately the same dimension with the lattice parameters of {ital a}=3.830--3.858 A and {ital c}=28.298--28.489 A. (La{sub 1/6}Gd{sub 1/3}Ba{sub 1/6}Sr{sub 1/6}Ce{sub 1/6}){sub 8}CU{sub 6}O{sub 18.83}, which was annealed at a high oxygen pressure of {ital P}(O{sub 2})=200 atm, exhibited a metallic temperature dependence of resistivity, and a very sharp superconducting transition at {ital T}{sub {ital c}}{sup on}=39 K ({ital T}{sub {ital c}}{sup {ital R}=0}=36 K). The Meissner signal at 10 K of this sample was about 35% of the perfect diamagnet.

• OSTI ID: 7009241
• 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
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE