Resonance magnetoelectric effects in disk-ring (piezoelectric - magnetostrictive) composite structure

The magnetoelectric effects in piezoelectric-disk/magnetostrictive-ring (PE-disk/MS-ring) structure at electromechanical resonance (EMR), where the magnetostrictive and piezoelectric phase are coupled through normal stresses, are modeled. The predicted resonance frequency and the frequency dependence of the magnetoelectric (ME) voltage coefficient are in good agreement with the data for the PZT (Pb(Zr0.52Ti0.48)O-3) -disk/CFO(CoFe2O4) -ring. The improved interfacial mechanical coupling through normal stresses is responsible for the enhanced magnetoelectric properties of the disk-ring structure. It is suggested that proper frequency and stronger ME effect in the disk-ring structure can be obtained by optimizing the structure. The ME effect in the disk-ring structure shows promising application in transducers for magnetoelectric energy conversion. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3670018]