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Preparation and properties of superconducting thin films by excimer laser ablation

Conference ·
DOI:https://doi.org/10.1557/PROC-191-147· OSTI ID:6905877
; ; ;  [1];  [2];  [3]
  1. Pacific Northwest Lab., Richland, WA (USA)
  2. Battelle Columbus Labs., OH (USA)
  3. Boeing Co., Renton, WA (USA). Aerospace and Electronics Div.
+ Show Author Affiliations

Excimer laser ablation with an in situ heat treatment was used to prepare high quality superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} thin films on (100)-SrTiO{sub 3} and (100)-LaAlO{sub 3} substrates. A pulsed excimer laser (XeCl; 308 nm) was used to ablate a rotating, bulk YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} target at a laser energy density of 2--3 J/cm{sup 2}. Based on four-probe dc resistance measurements, the films exhibited superconducting transition temperatures ({Tc}, midpoint) of 88 and 87K with 2K (90 {minus} 10%) transition widths for SrTiO{sub 3} and LaAlO{sub 3}, respectively. Transport critical current densities (J{sub c}) measured at 77K were 2 {times} 10{sup 6} and 1 {times} 10{sup 6} A/cm{sup 2} in zero field for SrTiO{sub 3} and LaAlO{sub 3}, respectively. X-ray diffraction (XRD) analysis showed the films to be highly oriented, with the c-axis perpendicular to the substrate surface. 11 refs., 5 figs.

Research Organization:
Pacific Northwest Lab., Richland, WA (USA)
Sponsoring Organization:
DOE/CE
DOE Contract Number:
AC06-76RL01830
OSTI ID:
6905877
Report Number(s):
PNL-SA-18024; CONF-900466--52; ON: DE90011929
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DEPOSITION
DIFFRACTION
EXCIMER LASERS
FILMS
GAS LASERS
HIGH-TC SUPERCONDUCTORS
LASERS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES