Magnetic-field induced electric response of simple magnetoelectric composite rods

A simple, long magnetoelectric (ME) composite rod with a long Pb(Zr, Ti)O-3 (PZT) rod embedded in Terfenol-D/epoxy medium is reported. Our results indicate that there is a critical aspect ratio around 10 for the PZT rod, above which a larger aspect ratio plays a limited role in enhancing the ME effect. Obvious anisotropy and high sensitivity to the magnetic field were observed in the ME composite rod. The ability for further minimization of the rods, remarkable sensitivity and stability of such simple ME composite rods are advantageous for their practical applications in magnetic-field micro-sensors.