Superconducting properties of HTSC thin films prepared in situ by single target deposition--

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · International Journal of Modern Physics B; (USA)

DOI:https://doi.org/10.1142/S0217979289000683· OSTI ID:6925639

Geerk, J; Hobel, M; Linker, G; Meyer, O; Ratzel, F; Schultheiss, C; Smithey, R; Strehlau, B; Weschenfelder, F ^[1]; Xi, X X; Guan, W Y ^[2]; Li, C ^[3]; Kus, P ^[4]

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1. Kernforschungszentrum Karlsruhe GmbH (Germany, F.R.). Inst. fuer Nukleare Festkoerperphysik
2. Peking Univ., Beijing, (CN)
3. Academia Sinica, Beijing, BJ (China). Inst. of Physics (China)
4. Komenskeho Univ., Bratislava (Czechoslovakia)

Thin films of ReBaCuO (Re = Y,Gd) and of BiCaSrCuO have been deposited onto Al{sub 2}O{sub 3}, MgO, SrTio{sub 3}, Si and ZrO{sub 2} substrates by planar and inverted cylindrical magnetron sputtering. The main advantage of this preparation technique is the high reproducibility allowing detailed and systematic studies of the film properties as a function of deposition parameters. Optimum deposition parameters were a high oxygen partial pressure of 2 {times} 10{sup {minus} 1} Torr in an oxygen-argon mixture and substrate temperatures near 800 {degrees} C. Except for the substrate Si the films grow highly textured on all substrates. For the 1-2-3 material zero resistance is obtained near 90 K for the case of textured growth. For Si the best film showed zero resistance near 84 K. High critical currents between 4 {times} 10{sup 5} and 5.5 {times} 10{sup 6} A/cm{sup 2} were determined for films of the 1-2-3 material on the substrates MgO, ZrO{sub 2} and SrTiO{sub 3}. On films SrTio{sub 3} tunnel junctions with Pb and In counterelectrodes could be prepared which showed a gap-like feature in their current-voltage characteristic. These junctions could be prepared with great reproducibility and experimental arguments could be provided which show that this gap-like feature is due to a superconducting density of states effect. First results are presented on YBaCuO thin films which were deposited by a novel ablation device which uses a pulsed electron beam instead of the laser beam.

• OSTI ID: 6925639
• Journal Information: International Journal of Modern Physics B; (USA), Journal Name: International Journal of Modern Physics B; (USA) Vol. 3:6; ISSN 0217-9792; ISSN IJPBE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ARGON
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
FABRICATION
FILMS
FLUIDS
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
GASES
HIGH TEMPERATURE
JOSEPHSON JUNCTIONS
JUNCTIONS
LASERS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE GASES
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES