The in-plane dielectric response of  oriented Ba0.60 Sr0.40 Ti O3 epitaxial films grown on  NdGa O3 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,  and [1- 10]. 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  direction, proves to be less sensitive to residual strain then the [1- 10] direction, although [1- 10] is capable of greater tunability at low residual strains.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)