Nonlinear dielectric properties of paraelectric (Ba,Sr)TiO3 thin films with isotropic and anisotropic epitaxy

W. K. Simon, J. A. Bellotti, E. K. Akdogan, A. Safari

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of isotropic and anisotropic epitaxy on the nonlinear dielectric response in (Ba 0.6,Sr 0.4 TiO 3 ) thin films were investigated experimentally. Under isotropic epitaxy, it is shown that the misfit is detrimental to the non-linear response of the films with decreasing film thickness. Nonlinear dielectric properties of films with in-plane compression exhibit more pronounced strain dependence, while the same does not set-in in film under tension down to 200 nm in thickness. In the case of anisotropic epitaxy, tunability exhibits directional dependence in the plane of the film and possesses orthorhombic symmetry in accordance to the Curie principle. The nonlinear dielectric response was found to be greater along the compressed directions.

Original languageEnglish (US)
Pages (from-to)185-191
Number of pages7
JournalFerroelectrics
Volume333
DOIs
StatePublished - May 1 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Keywords

  • Dielectric
  • Microwave
  • Paraelectric
  • Thin films
  • Tunability

Fingerprint

Dive into the research topics of 'Nonlinear dielectric properties of paraelectric (Ba,Sr)TiO<sub>3</sub> thin films with isotropic and anisotropic epitaxy'. Together they form a unique fingerprint.

Cite this