Superconducting Bi-Sr-Ca-Cu-O films by sputtering using a single oxide target
- AT T Bell Laboratories, Murray Hill, NJ 07974 (USA)
We have prepared superconducting thin films of Bi-Sr-Ca-Cu-O with T{sub c} (R=0) at 82 K and a 20% sharp drop in resistivity around 115 K by RF magnetron sputtering using a single oxide target. The nominal target composition is (metal cations) 2:1.56:1.09:1.86 of Bi:Sr:Ca:Cu. The as-deposited films have a compositional ratio of Bi{sub 2}Sr{sub 1.9}Ca{sub 1.3}Cu{sub 2.6}O{sub x} ({plus minus}5%) as determined by Rutherford backscattering spectrometry (RBS). The substrates used here are single-crystal SrTiO{sub 3}(100) and MgO(100). With heat treatments at temperatures above 860 {degree}C, we have obtained superconducting films with an almost single-phase Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8} as revealed by both X-ray diffraction and transmission electron microscopy (TEM). The films are highly textured with the c-axis perpendicular to the film plane. The room-temperature resistivity of the films is low around 100--200 {mu}{Omega}-cm. High critical current densities, in zero magnetic field, are of 10{sup 5} A/cm{sup 2} measured by the transport method at temperatures 10 K below T{sub c} (R=0). The superconducting properties such as T{sub c}'s and J{sub c}'s are independent of the film thickness in the range between 0.07 to 0.2 {mu}m.
- OSTI ID:
- 6948885
- Report Number(s):
- CONF-881035--
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (USA), Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Vol. 182:1; ISSN 0094-243X; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
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
DIFFRACTION
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
FABRICATION
FILMS
HEAT TREATMENTS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SAMPLE PREPARATION
SCATTERING
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTIVITY
THICKNESS
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION