TUNABLE RESONANT FREQUENCY OF FeCo/PZT/FeCo CYLINDERS

FeCo/PZT/FeCo cylindrical heterostructures were prepared by electroless deposition. Scanning electron microscopy shows that the magnetostrictive FeCo layers are in contact with piezoelectric PZT directly. To control the resonant frequency at which the magnetoelectric coupling shows an obvious improvement, the height of cylinder needs to be taken into consideration. In the present work, three hollow cylinders with different height were polarized along the radial direction. It was shown that with the increase of cylinder height the magnetoelectric coefficient increased. Both experimental and calculated results show that the resonant frequency of FeCo/PZT/FeCo cylindrical layered composites decreases with increasing the cylinder height. Proper resonant frequency and strong ME effect could be obtained by optimizing the configuration.