Title :
Annular bilayer magnetoelectric composites: theoretical analysis
Author :
Guo, Mingsen ; Dong, Shuxiang
Author_Institution :
Dept. of Adv. Mater. & Nanotechnol., Peking Univ., Beijing, China
fDate :
2/1/2010 12:00:00 AM
Abstract :
The laminated bilayer magnetoelectric (ME) composites consist of magnetostrictive and piezoelectric layers are known to have giant ME coefficient due to the high coupling efficiency in bending mode. In our previous report, the bar-shaped bilayer composite has been investigated by using a magnetoelectric-coupling equivalent circuit. Here, we propose an annular bilayer ME composite, which consists of magnetostrictive and piezoelectric rings. This composite has a much lower resonance frequency of bending mode compared with its radial mode. In addition, the annular bilayer ME composite is expected to respond to vortex magnetic field as well as unidirectional magnetic field. In this paper, we investigate the annular bilayer ME composite by using impedance-matrix method and predict the ME coefficients as a function of geometric parameters of the composites.
Keywords :
equivalent circuits; impedance matrix; magnetoelectric effects; magnetostriction; piezoelectricity; annular bilayer magnetoelectric composites; bending mode; equivalent circuit; geometric parameters; giant ME coefficient; high coupling efficiency; impedance matrix; laminated bilayer magnetoelectric composites; magnetoelectric coupling; magnetostrictive layers; magnetostrictive rings; piezoelectric layers; piezoelectric rings; resonance frequency; unidirectional magnetic field; vortex magnetic field; Coupling circuits; Equivalent circuits; Impedance; Magnetic analysis; Magnetic fields; Magnetic resonance; Magnetostriction; Resonant frequency;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2010.1428