We report the growth of <001>-oriented Ba0.6Sr0.4TiO3 (BST) thin films on polycrystalline Ni-alloy tapes by pulsed laser deposition using biaxially oriented, ion-beam-assisted deposited (IBAD) MgO and γ-Al2O3 buffer layers. Dielectric constant values of our BST films were up to ∼85% of those in the epitaxial films prepared under similar conditions on single-crystal MgO substrates. No significant dispersion of the dielectric constant was observed for frequencies from 100 Hz to 1 MHz. These results demonstrate the versatility of using IBAD-textured MgO and γ-Al2O3 buffer layers to integrate highly oriented good-quality BST films with nonsingle-crystalline substrates.
Published in:
Applied Physics Letters
(Volume:88
,
Issue:
6
)
Date of Publication:
Feb 2006
- Page(s):
-
062907
-
062907-3
- ISSN :
-
0003-6951
- Digital Object Identifier :
-
10.1063/1.2173232
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Feb 2006