Laser ablation of YBa sub 2 Cu sub 3 O sub 7 minus. delta. as probed by laser-induced fluorescence spectroscopy

Journal Article · Mon Oct 07 00:00:00 EDT 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.2102· OSTI ID:5207250

Otis, C E ^[1]; Dreyfus, R W ^[2]

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1. IBM Endicott Laser Spectroscopy Laboratory, 1701 North Street, Endicott, New York (USA)
2. IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York (USA)

Ground-state populations of cationic and neutral Y, Ba, Cu, and neutral YO, BaO, and CuO are monitored by laser-induced fluorescence during laser ablation of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. 193-nm photons completely dissociate CuO allowing the observation of a subsequent reaction of the Cu atom with O{sub 2} to form CuO. As a function of O{sub 2} pressure, the CuO signal increases to a maximum at approximately 120 mTorr of O{sub 2}, presumably minimizing {delta}, and then falls to negligible levels by 400 mTorr. Ablation at 248 and 351 nm dissociates a smaller fraction of the CuO, i.e., nascent CuO is observed in the absence of O{sub 2}.

• OSTI ID: 5207250
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:15; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ABLATION
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL GROWTH
CUPRATES
ELECTROMAGNETIC RADIATION
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
QUATERNARY COMPOUNDS
RADIATIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES