Figure 3
From: Ferroelectric thin film acoustic devices with electrical multiband switching ability
Excitation of odd (a) and even (b) normal modes in two layer FBAR. Arrows demonstrate the boundary movement. Frequency dependences of the real part of electric impedance of the model SrTiO3 (180 μm Pt/0.8 μm STO/0.05 μm Pt/0.8 μm STO/0.2 μm Pt) resonator at different mutual bias polarities illustrating frequency switching phenomena (c), (reproduced from A. Kozyrev, A. Mikhaylov, P. Petrov, and N. Alford, Electronics Letters 47, 1326 (2011), with the permission of IET).
