DocumentCode
1446521
Title
Control of Orientation of 
Films on Substrates With Low Lattice Mismatch Via Seed Layer Formation
Author
Markelov, Anton V. ; Samoilenkov, Sergej V. ; Akbashev, Andrey R. ; Vasiliev, Alexander L. ; Kaul, Andrey R.
Author_Institution
Dept. of Mater. Sci., Moscow State Univ., Moscow, Russia
Volume
21
Issue
3
fYear
2011
fDate
6/1/2011 12:00:00 AM
Firstpage
3066
Lastpage
3069
Abstract
The orientation of high Tc superconducting RBa2Cu3O7 (RBCO) films is crucial for achievement of high superconducting properties. However, it is known that good lattice match between film and substrate provides favorable conditions for the growth of undesirable (100)-oriented grains in RBCO films. In this paper we demonstrate, that orientation of RBCO film is influenced not only by the mismatch, but also by substrates crystal structure. It is observed, that few nanometer thick R2O3 (R=Nd-Gd,Y) layer on (001)SrTiO3 substrate effectively suppresses the formation of (100)-oriented grains in GdBCO films. To describe this behavior, a simple model based on the nucleus formation mechanism is presented.
Keywords
barium compounds; europium compounds; high-temperature superconductors; nanostructured materials; neodymium compounds; promethium compounds; samarium compounds; superconducting thin films; yttrium compounds; EuBa2Cu3O7; GdBa2Cu3O7; NdBa2Cu3O7; PmBa2Cu3O7; SmBa2Cu3O7; SrTiO3; YBCO; crystal structure; high-temperature superconducting films; nanometer thick layer; nucleus formation mechanism; orientation control; oriented grains; seed layer formation; Crystals; Epitaxial growth; Lattices; Substrates; Yttrium barium copper oxide; High ${rm T}_{rm c}$ film; lattice mismatch; orientation; seed layer;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2010.2102992
Filename
5710676
Link To Document