This paper will review the recent progress of the Texas Center for Superconductivity concerning the epitaxial growth of ferroelectric Ba1-xSrxTiO3 thin films on various substrates using pulsed laser ablation. Microstructure studies from X-ray diffraction and electron microscopy suggest that the as-grown films on (001) LaAlO3 and (001) MgO are c-axis oriented with excellent single crystallinity. The Rutherford Back-Scattering Spectroscopic studies indicate that the films have excellent epitaxial behavior. Microwave property measurements showed that the room temperature dielectric constant could be tuned up to 33% at 2.33 V/μm applied electric field. The coupled microwave phase shifter has achieved a phase shift of over 200° at 23.675 GHz and a figure of merit of about 55°/dB at room temperature. These results demonstrate that the epitaxial Ba1-xSrxTiO3 thin films are close to becoming used in the practical applications for the wireless rf communications.
|Number of pages||9|
|Publication status||Published - 2001|
|Event||6th International Simposium on Ferroic Domains and Mesoscopic Structures (ISFD-6) - Nanjing, China|
Duration: 2000 May 29 → 2000 Jun 2
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics