Figure 5
From: Ferroelectric thin film acoustic devices with electrical multiband switching ability
Frequency dependences of the real part of electric impedance of the model four-layer SrTiO3 resonator (four 1 μm STO layers) for different combinations of the polarities and absolute values of bias fields applied to each layer (values of bias fields are normalized to 40 V/μm) (reproduced from A. Kozyrev, A. Mikhailov, S. Ptashnik, P. K. Petrov, and N. Alford, Applied Physics Letters 105, 162910 (2014), with the permission of AIP Publishing).
