Jump effect based magnetically tunable resonance of PZT-ring/TDF-strip composite with improved sensitivity

By considering the jump effect of magnetostrictive materials, a novel structure of PZT-ring/TDF-strip magnetoelectric composite is proposed to achieve magnetically tunable electromechanical resonance with a DC bias magnetic field. With the jump effect induced piezomagnetic coefficient of the Tb0.3Dy0.7Fe1.92 strip, the resonance properties of the Pb(Zr,Ti)O3 ring are theoretically studied and experimentally measured. The highly consistent results prove that the proposed composite has two resonant frequencies with improved sensitivity (133 Hz/Oe) and enhanced resolution (722 ppm/Oe) of resonance shift, which provide the feasibility of magnetically tunable electromechanical resonance with a low magnetic field and suggest the application potential for controllable sonar transducer.