Conditions for oriented growth of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O films by pulsed laser ablation

Journal Article · Thu Feb 14 23:00:00 EST 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348672· OSTI ID:5638372

Krebs, H -U; Kehlenbeck, M ^[1]; Steins, M; Kupcik, V ^[2]

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1. Institut f uer Metallphysik, Hospitalstrasse 3-7, Universitaet Goettingen, D-3400 Goettingen, Federal Republic of Germany (DE)
2. Mineralogisch-Kristallographisches Institut, V. M. Goldschmidt-Str. 1, D-3400 Goettingen (Federal Republic of Germany)

Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O films have been grown {ital in} {ital situ} on amorphous SiO{sub 2} by excimer laser ablation in order to study the growth and orientation of the perovskite structures and to compare it with the epitaxial growth on single-crystalline SrTiO{sub 3}. Under fixed experimental conditions optimum combinations of the oxygen partial pressure and substrate temperature for the deposition of {ital c}-axis oriented films were determined. The results on the morphology and orientation of the grains, which influence the superconducting properties, are discussed with respect to thermodynamic data available for the 123 phase and kinetic constraints. While superconducting transitions {ital T}{sub {ital c}} of 90 K and critical current densities of about 3{times}10{sup 6} A/cm{sup 2} at 77 K are obtained on SrTiO{sub 3}, the values are reduced to about 84 K and 10{sup 4} A/cm{sup 2} on SiO{sub 2}, respectively, due to the diffusion of Si into the film and the different microstructure.

• OSTI ID: 5638372
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:4; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
ALKALINE EARTH METAL COMPOUNDS
AMORPHOUS STATE
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
FILMS
GRAIN ORIENTATION
GROWTH
LASER RADIATION
MICROSTRUCTURE
MORPHOLOGY
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SILICON COMPOUNDS
SILICON OXIDES
SUBSTRATES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES