Study of the oxygen depletion in the film-substrate interfaceof superconducting YBa sub 2 Cu sub 3 O sub 7 minus x films

Journal Article · Mon Dec 16 04:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106397· OSTI ID:6192483

Colino, J; Sacedon, J L ^[1]; Vicent, J L ^[2]

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1. Instituto de Ciencia de Materiales, C.S.I.C., Serrano 144, Madrid 28006 (Spain)
2. Departamento de Fisica de Materiales, Facultad de Fisicas, Universidad Complutense, Madrid 28040 Instituto de Ciencia de Materiales, C.S.I.C., Serrano 144, Madrid 28006 (Spain)

Auger electron spectroscopy (AES) depth profiles were carried out on {ital c}-axis oriented YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} films grown {ital in} {ital situ} onto SrTiO{sub 3} (100) and polycrystalline yttria-stabilized zirconia substrates. These films were grown by on-axis single-target dc planar magnetron sputtering, and they show zero resistance as high as 90.2 K and critical currents above 10{sup 5} A/cm{sup 2} (77 K). The AES depth profiles reveal a clear oxygen loss at the interface. This oxygen deficiency corresponds to an atomic decrease from 7 to 6.6--6.3 per unit cell, in good agreement with the tetragonal structure oxygen composition. This confirms the oxygen-deficient first stages of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} film growth on some usual cubic substrates, and that those first layers do not become fully oxidized after the oxygen intake on the cooling in O{sub 2} atmosphere.

• OSTI ID: 6192483
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:25; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
AUGER ELECTRON SPECTROSCOPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL GROWTH
CUPRATES
ELECTRON SPECTROSCOPY
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
HIGH-TC SUPERCONDUCTORS
INTERFACES
MAGNETRONS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
ORGANIC COMPOUNDS
OXIDES
OXYGEN ADDITIONS
OXYGEN COMPOUNDS
QUATERNARY COMPOUNDS
SPECTROSCOPY
SPUTTERING
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES