Single-chamber, in situ processing of superconducting YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films on stainless steel with yttria-stabilized zirconia buffer layer
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916 (US)
Single-chamber {ital in} {ital situ} laser processing of high-{ital T}{sub {ital c}} YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} film on stainless steel (302) substrates with yttria-stabilized zirconia (YSZ) buffer layers, has been carried out using a multitarget deposition system. YSZ and YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films were deposited sequentially by KrF excimer laser ({lambda}=248 nm) at substrate temperature of 650 {degree}C. The films were characterized by x-ray diffraction, four point probe ac electrical resistivity, scanning electron microscopy and Auger electron spectroscopy (AES) techniques. Due to the matching of the thermal expansion coefficient of YSZ with stainless steel and its diffusion barrier characteristics, good quality high-{ital T}{sub {ital c}} films have been grown on stainless steel substrates with superconducting transition temperature, {ital T}{sub {ital c}} (onset), of 92 K and {ital T}{sub {ital co}} (zero resistivity temperature) of 84 K. AES depth profiling indicated little interdiffusion of Fe across the interface of YSZ and stainless steel. A laser evaporation method was used for patterning the YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films and critical current density, {ital J}{sub {ital c}}, was measured to be {similar to}5{times}10{sup 4} Acm{sup {minus}2} at 40 K. It was observed that the zero resistivity temperature significantly changed with the variation of buffer layer thickness, buffer layer processing temperature, and ambient oxygen partial pressure during the deposition of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}.
- OSTI ID:
- 5736069
- Journal Information:
- Journal of Applied Physics; (USA), Vol. 69:4; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM OXIDES
DEPOSITION
COPPER OXIDES
YTTRIUM OXIDES
BUFFERS
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
FILMS
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
LAYERS
SCANNING ELECTRON MICROSCOPY
STAINLESS STEEL-302
SUBSTRATES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
ZIRCONIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AUSTENITIC STEELS
BARIUM COMPOUNDS
CHALCOGENIDES
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COHERENT SCATTERING
COPPER COMPOUNDS
CORROSION RESISTANT ALLOYS
CURRENTS
DIFFRACTION
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MICROSCOPY
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
STAINLESS STEELS
STEEL-CR18NI9
STEELS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication