A COMPARISON STUDY OF (100) AND (110) BA0.5SR0.5TIO3 EPITAXIAL THIN-FILMS GROWN ON SUPERCONDUCTING YBA2CU3O7 THIN-FILM SUBSTRATES

Authors
WU NJ LIN H XIE K LI XY IGNATIEV A
Citation
Nj. Wu et al., A COMPARISON STUDY OF (100) AND (110) BA0.5SR0.5TIO3 EPITAXIAL THIN-FILMS GROWN ON SUPERCONDUCTING YBA2CU3O7 THIN-FILM SUBSTRATES, Physica. C, Superconductivity, 232(1-2), 1994, pp. 151-157
Citations number
22
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
232
Issue
1-2
Year of publication
1994
Pages
151 - 157
Database
ISI
SICI code
0921-4534(1994)232:1-2<151:ACSO(A>2.0.ZU;2-S
Abstract
Ba0.5Sr0.5TiO3 (BST) thin films have been fabricated by pulsed laser d eposition with the objective of integrating oriented epitaxial ferroel ectric films on high-T(c) superconducting YBa2Cu3O7-x (YBCO) thin film s. Perovskite-type BST (100) films grown at 550-degrees-C-620-degrees- C on c oriented YBCO thin-film substrates exhibited good crystallinity . Highly aligned BST (110) films were grown on YBCO (110) substrates o ver a much narrower temperature range of 565-degrees to 585-degrees-C. The morphology of BST (110) thin films is smoother than of BST (100) films. The BST (100) and BST (110) thin films both showed ferroelectri c behavior below 250 K, with a maximum remnant polarization of 1.4 muC /cm2 for BST (100) on c oriented YBCO, and 0.8 muC/cm2 for BST (110) o n YBCO (110). The temperature-dependent differences in dielectric prop erties between BST (100) on c oriented YBCO and BST (110) on YBCO (110 ) thin-film systems were investigated.