Composition dependence of high T sub c phase formation in Pb-doped Bi-Sr-Ca-Cu-O thin films

Journal Article · Mon Sep 18 04:00:00 EDT 1989 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102468· OSTI ID:5574568

Tanaka, A; Kamehara, N; Niwa, K ^[1]

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1. Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-01, Japan (JP)

We studied the composition dependence of high {ital T}{sub {ital c}} phase Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital x}} formation in Pb-doped Bi system thin films. Films were prepared by rf magnetron sputtering using three targets and post-annealed to synthesize superconducting films. In addition to a Bi-Sr-Ca-Cu-O target, PbO and CuO targets were used to dope sufficient Pb into the films and to optimize the Cu content. Although heavily Pb-doped thin films form the high {ital T}{sub {ital c}} phase rapidly, they are multiphased and have poor morphology. The Cu content decreases slightly during sintering. Minimizing the amount of doped Pb needed for the high {ital T}{sub {ital c}} phase formation improves morphology, and slightly Cu-rich composition is effective in forming the high {ital T}{sub {ital c}} phase. Nearly single-phase high {ital T}{sub {ital c}} films were obtained from the as-deposited compositions of Bi:Pb:Sr:Ca:Cu=1.02:0.80:1.00:0.99:1.64 after only one hour of sintering in air at 851 {degree}C. The single-phase high {ital T}{sub {ital c}} film forms in a very narrow sintering temperature range.

• OSTI ID: 5574568
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 55:12; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FABRICATION
FILMS
INFORMATION
LEAD COMPOUNDS
LEAD OXIDES
LOW TEMPERATURE
MORPHOLOGY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SINTERING
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE