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Buffer layers for high-T[sub c] thin films on sapphire

Journal Article · · Journal of Superconductivity; (United States)
DOI:https://doi.org/10.1007/BF00618135· OSTI ID:7275385
; ; ;  [1];  [2]; ; ;  [3]
  1. Los Alamos National Lab., NM (United States)
  2. Neocera, Inc., College Park, MD (United States)
  3. David Sarnoff Research Center, Princeton, NJ (United States)
+ Show Author Affiliations

Buffer layers of various oxides including CeO[sub 2] and yttrium-stabilized zirconia (YSZ) have been deposited on R-plane sapphire. The orientation and crystallinity of the layers were optimized to promote epitaxial growth of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (YBCO) thin films. An ion beam channeling minimum yield of [approximately]3% was obtained in the CeO[sub 2] layer on sapphire, indicating excellent crystallinity of the buffer layer. Among the buffer materials used, CeO[sub 2] was found to be the best one for YBCO thin films on R-plane sapphire. High T[sub c] and J[sub c] were obtained in YBCO thin films on sapphire with buffer layers. Surface resistances of the YBCO films were approximately 4 m[Omega] at 77 K and 25 GHz. 19 refs., 10 figs.

OSTI ID:
7275385
Journal Information:
Journal of Superconductivity; (United States), Journal Name: Journal of Superconductivity; (United States) Vol. 5:4; ISSN JOUSEH; ISSN 0896-1107
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHANNELING
COPPER COMPOUNDS
CORUNDUM
CRYSTAL GROWTH
CRYSTAL STRUCTURE
CUPRATES
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EPITAXY
FILMS
HIGH-TC SUPERCONDUCTORS
ION CHANNELING
JOSEPHSON EFFECT
MINERALS
ORIENTATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SAPPHIRE
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES