Tunneling spectroscopy in thin films YBCO/Pb tunnel structures

Conference · Tue Feb 28 23:00:00 EST 1989 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6932264

Benacka, S; Plecenik, A; Chromik, S; Gazi, S; Levarsky, J; Strbik, V; Takaos, S ^[1]; Svistunov, V M ^[2]

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1. Institute of Electrical Engineering of Electro-Physical Research Centre, Slovak Acad. Sci., 842 39 Bratislava, (CS)
2. Physico-Technical Institute of Acad. Sci. Ukrainian SSR, Donetsk, (SU)

Experimental results on electron tunneling into thin superconducting films YBa{sub 2}Cu{sub 3}O{sub x} in YBCO/Pb tunnel junctions are reported. Thin superconducting films YBCO (thickness 0.7 {mu}m) were prepared by codeposition of Y, BaO, and Cu onto single crystal substrates - - sapphire, MgO, SrTiO{sub 3}. Maximum critical temperature at zero resistivity was T{sub ce} = 85 K. The surface of films is smooth with pancake- shaped grains. The tunnel structure was completed by vacuum deposition of superconducting Pb film (thickness 0.3 {mu}m) onto YBCO film with either uncleaned surface or after cleaning in Ar or O{sub 2} plasma. Two mechanisms are presented which can lead to resonances in the tunneling current of high T{sub c} superconductors.

• OSTI ID: 6932264
• Report Number(s): CONF-880812--
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA) Vol. 25:2; ISSN IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CORUNDUM
CRITICAL TEMPERATURE
CRYSTAL STRUCTURE
CRYSTALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
EXCITATION
FABRICATION
FILMS
GRAIN ORIENTATION
INFORMATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSTRUCTURE
MINERALS
MONOCRYSTALS
NUMERICAL DATA
ORIENTATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SAPPHIRE
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TUNNELING
YTTRIUM COMPOUNDS
YTTRIUM OXIDES