Design and analysis of a self-biased broadband magnetoelectric cantilever operated at multi-frequency windows

Abstract

Magnetoelectric (ME) composites with self-biased and wide resonance frequency band properties are promising candidates for magnetic field sensor and energy harvester. Here, we present a ME cantilever by in-series connecting a few SrFe12O19/Metglas/Pb(Zr,Ti)O3 components. Due to the in-built magnetic bias of SrFe12O19, the ME cantilever shows self-biased property. Meanwhile, by merging the resonance responses of the in-series ME components together, the ME cantilever presents multi-wide resonance bands (i.e., 500 Hz ∼ 700 Hz, 3.3 kHz ∼ 4.4 kHz and 44 kHz ∼ 70 kHz). In these three wide frequency windows, the ME voltage coefficients (αV) of the ME cantilever are higher than 40 mV/Oe, 115 mV/Oe and 400 mV/Oe, respectively.