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 :
