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

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

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

Tanaka, A; Kamehara, N; Niwa, K ^[1]

---

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), Vol. 55:12; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
CHEMICAL COMPOSITION
SUPERCONDUCTIVITY
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
FABRICATION
CRYSTAL DOPING
EXPERIMENTAL DATA
LEAD OXIDES
LOW TEMPERATURE
MORPHOLOGY
PHASE STUDIES
SINTERING
SPUTTERING
THIN FILMS
VERY HIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
INFORMATION
LEAD COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication