DC bias dependent shift of resonance frequencies in BST thin film membranes

DC bias dependent acoustic resonance phenomena have been observed in micromachined tunable thin film capacitors based on Ba0.3Sr0.7TiO3 (BST) thin films. The antiresonance frequency is only weakly dc bias dependent, whereas the resonance frequency exhibits a strong dependence on the applied dc bias. The resonance frequency shifted by 0.8% for a frequency of about 3.44 GHz and an applied of 333 KV/cm. At the same time the electromechanical coupling constant k(t)(2) increased to 1.8%. The experimental observations correlate well with the theoretical predictions derived from the free energy P expansion using Landau theory.


Published in:
2007 Sixteenth Ieee International Symposium On The Applications Of Ferroelectrics, Vols 1 And 2, 236-238
Presented at:
16th IEEE International Symposium on Applications of Ferroelectrics, Nara, JAPAN, May 27-31, 2007
Year:
2007
Publisher:
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa
ISBN:
978-1-4244-1333-1
Keywords:
Laboratories:




 Record created 2012-07-04, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)