(Tl, Pb, Bi)Sr sub 2 Ca sub 2 Cu sub 3 O sub z superconductors with zero resistance at 120 K

Journal Article · Sun Mar 25 23:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103174· OSTI ID:7144355

Kaneko, T; Wada, T; 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 new superconductors of nearly single phase with zero-resistance temperatures around 120 K employing a novel method for sintering. The samples included a nominal composition of (Tl{sub 0.64}Pb{sub 0.2}Bi{sub 0.16})Sr{sub 2}Ca{sub 3}Cu{sub 4}O{sub {ital z}}. This sample was prepared from the mixture of presynthesized (Tl{sub 0.64}Pb{sub 0.2}Bi{sub 0.16})Sr{sub 2}CaCu{sub 2}O{sub {ital z}} (1212 phase), CaO, and CuO powders. The mixed powder was sintered at 920 {degree}C in O{sub 2} gas and post-annealed at 400--600 {degree}C in O{sub 2} gas. The powder x-ray diffraction revealed that the sample was isostructural with the Tl-based (Tl, Pb, Bi)Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital z}} (1223 phase). The sample exhibited a sharp superconducting transition at {ital T}{sup onset}{sub {ital c}}=125 K and {ital T}{sup {ital R}=0}{sub {ital c}}=120 K and the superconducting diamagnetic signal at 10 K was about 20% of a full Meissner effect.

• OSTI ID: 7144355
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:13; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
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
ANNEALING
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
HEAT TREATMENTS
HIGH TEMPERATURE
LEAD COMPOUNDS
LEAD OXIDES
LOW TEMPERATURE
MEISSNER-OCHSENFELD EFFECT
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHASE STUDIES
PHYSICAL PROPERTIES
SCATTERING
SINTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION