Deposition of epitaxial thin films of Nd sub 1. 85 Ce sub 0. 15 CuO sub 4 minus y by laser ablation

Journal Article · Mon Oct 23 04:00:00 EDT 1989 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102321· OSTI ID:5374311

Gupta, A; Koren, G; Tsuei, C C; Segmuller, A; McGuire, T R ^[1]

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1. IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (US)

Thin films of the electron-doped superconductor Nd{sub 1.85} Ce{sub 0.15} CuO{sub 4{minus}{ital y}} have been deposited on (100) SrTiO{sub 3} substrates at 780 {degree}C using the laser ablation technique. The deposited films are very smooth and show epitaxial growth with the {ital c} axis normal to the substrate. The transport properties of the films are very sensitive to the concentration of oxygen vacancies. Films deposited and cooled in the presence of 150 mTorr O{sub 2} exhibit localization behavior with no evidence of superconductivity down to 5 K. Superconductivity is observed on vacuum annealing the films {ital in} {ital situ} after deposition. Films with optimum concentration of oxygen vacancies show a superconducting onset temperature of 21 K and {ital T}{sub {ital c}} ({ital R}=0) of 20 K, with a critical current density of 2{times}10{sup 5} A/cm{sup 2} at 5.5 K in zero magnetic field.

• OSTI ID: 5374311
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 55:17; 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
ABLATION
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COATINGS
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENT DENSITY
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
EPITAXY
EXPERIMENTAL DATA
FABRICATION
FILMS
HEAT TREATMENTS
INFORMATION
LASER RADIATION
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
RADIATIONS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VACANCIES
VAPOR DEPOSITED COATINGS
VAPOR PHASE EPITAXY
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE