Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2189667
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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 [(1) over bar 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 [001] direction, proves to be less sensitive to residual strain then the [(1) over bar 10] direction, although [(1) over bar 10] is capable of greater tunability at low residual strains. (c) 2006 American Institute of Physics.
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