Regulated epitaxy of YBa2Cu3O7-delta by atomic control of step arrays on vicinal SrTiO3(100) substrates

Authors
Nie, JC Takashima, H Terada, N Shoji, A Koyanagi, M
Citation
Jc. Nie et al., Regulated epitaxy of YBa2Cu3O7-delta by atomic control of step arrays on vicinal SrTiO3(100) substrates, JPN J A P 2, 38(12B), 1999, pp. L1499-L1501
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
38
Issue
12B
Year of publication
1999
Pages
L1499 - L1501
Database
ISI
SICI code
Abstract
We have investigated the surface morphologies of vicinal SrTiO3 substrates and YBa2Cu3O7-delta (YBCO) thin films by atomic force microscopy (AFM). Ext remely regular step arrays had been successfully developed vicinal SrTiO3 w ith 5.7 degrees misorientation. AFM reveals a great improvement of the surf ace microstructures of YBCO thin films grown on such terraced vicinal subst rates, exhibiting a regular step-flow growth mode and almost precipitate fr ee surfaces of practical device sizes. By a high growth rate and low growth temperature, the step bunching and therefore the total roughness have been substantially suppressed.