Fabrication of Tl-Ca-Ba-Cu-O superconducting thin films on LaAlO sub 3 substrates

Journal Article · Mon Apr 30 04:00:00 EDT 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103104· OSTI ID:6837460

Subramanyam, G; Radpour, F; Kapoor, V J ^[1]

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1. Electronic Devices Materials Research Laboratory, Department of Electrical Engineering Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0030 (USA)

For the first time, fabrication of high-temperature superconducting Tl-Ca-Ba-Cu-O (TlCaBaCuO) thin films on LaAlO{sub 3} substrates is reported. TlCaBaCuO thin films were deposited by rf magnetron sputtering of a single composite powder target in a pure argon plasma. The films were sintered in an excess thallium ambient at 850 {degree}C for 15 min followed by a 30 min oxygen annealing at 750 {degree}C. Scanning electron microscopy and x-ray diffraction results showed the smooth and highly {ital c}-axis oriented nature of the thin films. The temperature dependence of resistance showed the onset of critical transition temperature ({ital T}{sub {ital c}}) at 114 K, and zero resistance at 103 K.

• OSTI ID: 6837460
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:18; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FILMS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SORPTIVE PROPERTIES
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SURFACE PROPERTIES
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE