Direct imaging of the fragments produced during excimer laser ablation of YBa sub 2 Cu sub 3 O sub 7 minus. delta
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York (USA)
The evolution dynamics of the fragments produced during KrF excimer laser (248 nm, 25 ns) ablation of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} has been observed by ultrafast photography using a synchronized dye laser beam ({similar to}1 ns) to probe above the target surface. The images show that fragment removal is initiated near the beginning of the laser pulse ({gt}10 ns), continues for a maximum of a few hundred nanoseconds, and has an expansion front velocity suggesting a target temperature varying from about 1500 to 4000 K or greater. The shock wave formed due to interaction of the ablated fragments with background oxygen gas has also been photographed, and its temporal evolution as a function of oxygen pressure has been shown to agree better with a planar than spherical model. The overall picture is that of an ablation process showing pronounced but understandable gas-dynamic effects.
- OSTI ID:
- 5278790
- Journal Information:
- Applied Physics Letters; (United States), Vol. 59:11; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Evolution and dynamics of excimer laser vaporized YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} plumes
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Related Subjects
BARIUM OXIDES
ABLATION
COPPER OXIDES
YTTRIUM OXIDES
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
PHOTOGRAPHY
QUATERNARY COMPOUNDS
SHOCK WAVES
TIME RESOLUTION
ULTRAHIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTROMAGNETIC RADIATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RESOLUTION
SUPERCONDUCTORS
TIMING PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication