The in-plane dielectric response of [110] oriented Ba0.60Sr0.40TiO3 epitaxial films grown on [100] NdGaO3 is used to determine the field induced polarization at 10 GHz. The nonlinear polarization curve is used to determine the linear and nonlinear permittivity terms for the in-plane principal directions, [001] and [110]. Studied films are in the thickness range of 75–1200 nm, and clearly show the influences that drive tunability down with increasing residual strain. The variation of the tunability, along the [001] direction, proves to be less sensitive to residual strain then the [110] direction, although [110] is capable of greater tunability at low residual strains.
Published in:
Applied Physics Letters
(Volume:88
,
Issue:
13
)
Date of Publication:
Mar 2006
- Page(s):
-
132902
-
132902-3
- ISSN :
-
0003-6951
- Digital Object Identifier :
-
10.1063/1.2189667
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Mar 2006