Abstract
We have found unusual re-evaporation effect on the surface morphology of Gd x Y 1-x Ca 4 O(BO 3 ) 3 (Gd x Y 1-x COB) films grown by combinatorial laser molecular-beam epitaxy. The surface morphologies of the Gd x Y 1-x COB films grown on the atomically flat (0 1 0) GdCa 4 O(BO 3 ) 3 (GdCOB) substrates were strongly dependent on the deposition conditions such as substrate temperature and laser repetition rate. Decreasing the substrate temperature and/or increasing the laser repetition rate improved the surface morphology of the film since at such deposition conditions, re-evaporation which may make film surface rough could be effectively restrained. Gd x Y 1-x COB film grown at 500 °C and 4 Hz exhibited the ultra-smooth surface like that of the atomically smooth (0 1 0) GdCOB substrate. Under such conditions, intensity monitoring of reflection high-energy electron diffraction revealed the layer-by-layer growth of the film. Using this regulated growth behavior of the films we have successfully fabricated such nano-structured films as [GdCOB/YCa 4 O(BO 3 ) 3 ] superlattices.
Original language | English |
---|---|
Pages (from-to) | 406-410 |
Number of pages | 5 |
Journal | Applied Surface Science |
Volume | 197-198 |
DOIs | |
Publication status | Published - 2002 |
Externally published | Yes |
Event | Cola 2001 - Tsukuba, Japan Duration: 2001 Oct 1 → 2001 Oct 1 |
Keywords
- Gd Y COB
- Laser MBE
- Re-evaporation
- Surface
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films