Preparation and properties of superconducting thin films by excimer laser ablation

Conference · Sun Apr 01 00:00:00 EST 1990

DOI:https://doi.org/10.1557/PROC-191-147· OSTI ID:6905877

Geusic, M E; Stewart, A F; Pederson, L R; Weber, W J ^[1]; Marken, K R ^[2]; Li, Kin ^[3]

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1. Pacific Northwest Lab., Richland, WA (USA)
2. Battelle Columbus Labs., OH (USA)
3. Boeing Co., Renton, WA (USA). Aerospace and Electronics Div.

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 National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6905877
• Report Number(s): PNL-SA-18024; CONF-900466-52; ON: DE90011929
• Resource Relation: Journal Volume: 191; Conference: Spring meeting of the Materials Research Society, San Francisco, CA (USA), 16-21 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

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