Laser wavelength dependent properties of YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films deposited by laser ablation
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (US)
YBa{sub 2}Cu{sub 3}O{sub 7}{sub {minus}{delta}} thin films were deposited onto (100) SrTiO{sub 3} substrates using 1064, 532, 355, 248, and 193 nm laser ablation. Transport measurements show lower normal-state resistivities and higher critical currents in films deposited by the shorter wavelength lasers. The surface morphology of the films was rough with large particulates when the 1064 nm laser was used whereas much smoother surfaces with fewer and smaller particulates were obtained with the UV lasers. It is suggested that the better film quality obtained when the UV lasers are used is due to a small absorption depth of the UV photons in the ceramic target and to higher absorption by the ablated fragments. This leads to smaller ablated species and further fragmentation in the hotter plume and, therefore, to smoother and denser films.
- OSTI ID:
- 5067500
- Journal Information:
- Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 55:23; ISSN APPLA; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FABRICATION
FILMS
INFORMATION
LOW TEMPERATURE
MORPHOLOGY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
RADIATIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SURFACES
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES