The effect of lattice matching between buffer layer and YBa2Cu3O7-delta thin film on in-plane alignment of C-axis oriented thin films

Citation
K. Chiba et al., The effect of lattice matching between buffer layer and YBa2Cu3O7-delta thin film on in-plane alignment of C-axis oriented thin films, IEEE APPL S, 11(1), 2001, pp. 2734-2737
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
1051-8223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
3
Pages
2734 - 2737
Database
ISI
SICI code
1051-8223(200103)11:1<2734:TEOLMB>2.0.ZU;2-M
Abstract
The effect of lattice matching between YBa2Cu3O7-delta (YBCO) films and buf fer layers as well as between buffer layers and MgO substrates have been di scussed from viewpoints of crystalline, critical temperature and surface re sistance of YBCO films. SrSnO3 (SSO) as well as BaSnO3 (BSO) were used as b uffer materials. SSO has closer lattice constant to YBCO than BSO. YBCO fil ms were grown on these materials at the optimal growth temperature by pulse laser deposition. The FWHM of phi -scan (102) plane of YBCO films on SSO b uffer lavers was smaller than that of YBCO films on BSO buffer layers. Howe ver the values of FWHM of 005 rocking-curve of YBCO films on BSO buffer lay er were smaller than that of YBCO films on SSO buffer layer. The difference of surface resistance between YBCO film on BSO buffer layer and YBCO film on SSO buffer layer was very small indicating superconducting properties ar e not mainly governed by lattice mismatch at this region. We obtained the s ame values for c-axis length and critical temperature in YBCO films on thes e materials.