Structure and superconducting properties of YBa sub 2 Cu sub 3 O sub 7 minus x films prepared by nitrogen laser evaporation and CO sub 2 laser annealing in oxygen

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.345039· OSTI ID:6883610

Serbezov, V ^[1]; Benacka, S ^[2]; Hadgiev, D ^[3]; Atanasov, P ^[4]; Elektronov, N ^[5]; Smatko, V; Stribik, V ^[2]; Vassilev, N ^[5]

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1. Institute of Applied Physics, Bulgarian Academy of Sciences, Plovdiv, (Bulgaria)
2. Institute of Electrical Engineering of the Electro-Physical Research of the Slovak Academy of Sciences, 842 39 Bratislava (Czechoslovakia)
3. Plovdiv University, Faculty of Physics and Chemistry, Plovdiv (Bulgaria)
4. Institute of Electronics, Bulgarian Academy of Sciences, 72 Lenin Boulevard, Sofia 1784 (Bulgaria)
5. Institute of Applied Physics, Bulgarian Academy of Sciences, Plovdiv (Bulgaria)

Superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} thin films were obtained under high vacuum (10{sup {minus}5} Torr) on substrates of polycrystalline Al{sub 2}O{sub 3} sapphire, SrTiO{sub 3}, and Si, having zero resistance at 81, 85, 87, and 79 K, respectively. A N{sub 2} laser of 3.5 J cm{sup {minus}2} energy density was used for the evaporation. The substrates were heated by a cw single-mode CO{sub 2} laser and the annealing was performed by the same laser in O{sub 2} atmosphere. Local planar superconducting regions were obtained by focusing the radiation of the cw CO{sub 2} laser upon the films. The films were investigated by scanning electron microscope, x-ray microanalysis, and x-ray diffraction.

• OSTI ID: 6883610
• Journal Information: Journal of Applied Physics; (USA), Vol. 67:11; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRYSTAL STRUCTURE
SUPERCONDUCTIVITY
COPPER OXIDES
YTTRIUM OXIDES
ALUMINIUM OXIDES
ANNEALING
LASER RADIATION
POLYCRYSTALS
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
SUPERCONDUCTING FILMS
VAPOR DEPOSITED COATINGS
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COATINGS
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTALS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
FILMS
HEAT TREATMENTS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies