AFM study of CeO{sub 2} growth on sapphire as a buffer layer for YBa{sub 2}Cu{sub 3}O{sub 7}

Book · Fri Nov 01 04:00:00 EST 1996

OSTI ID:392178

Denhoff, M W; Mason, B F; Tran, H T; Grant, P D ^[1]

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1. National Research Council, Ottawa, Ontario (Canada). Inst. for Microstructural Sciences

The structure of CeO{sub 2} films grown on (1102) sapphire and on YBCO thin films was investigated. The films reported on here were grown by pulsed excimer laser deposition and their surface structure was probed using atomic force microscopy. The authors found that CeO{sub 2} films grown on sapphire were epitaxial with a granular structure which is smooth on an atomic scale. They see evidence of a surface reconstruction on a very smooth CeO{sub 2} (100) oriented surface. At higher growth temperatures, three dimensional islands begin to form. When a CeO{sub 2} film is grown on top of a YBCO film, the growth mode is two dimensional. The steps in this layer by layer growth are a surprisingly large 2 nm. This is about equal to 4 times the CeO{sub 2} lattice constant. This step height appears to be temperature dependent.

• OSTI ID: 392178
• Report Number(s): CONF-951155--; ISBN 1-55899-304-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CERIUM OXIDES
COPPER OXIDES
ENERGY BEAM DEPOSITION
EXPERIMENTAL DATA
GRAIN SIZE
LASERS
MICROSCOPY
MICROSTRUCTURE
MORPHOLOGY
ORIENTATION
SAPPHIRE
SUBSTRATES
X-RAY DIFFRACTION
YTTRIUM OXIDES