Figure 2
From: Correlation between tunability and anisotropy in magnetoelectric voltage tunable inductor (VTI)
Tunability of Metglas VTI. (a)(b)(c) Inductance and (d)(e)(f) quality factor spectra of the plate-type (E-field up), ring-type (E-field up), and ring-type (E-field down) of Metglas/PMN-PZT voltage tunable inductor, respectively. The electric field dependence of (g) L E/L 0, (h) tunability γ of Metglas/PMN-PZT plate-type and ring-type VTI at 1 kHz. (i) linear fitting of γ - E for ring-type voltage tunable inductor. Giant changes in the magnitude of inductance can be seen with slight increase in the applied electric field. The changes are reversible as shown by the drive in both up and down directions. Small hysteresis in the up and down drive is related to the non-linearity in the piezoelectric material. Ring-type inductor shows rapid drop in inductance value with applied electric field. Tunability of ring-type inductor reaches up to 1150% as compared to 46% for the plate-type demonstrating the important role of shape anisotropy.
