PREPARATION AND PROPERTIES OF ELASTICALLY COUPLED ELECTROMAGNETIC ELEMENTS WITH A BONDING STRUCTURE

Elastically coupled electro-magnetic(EM) elements were constructed and their fundamental properties were studied so as to examine whether th e elements exhibit considerable EM effect at room temperature. The ele ments had a hybrid structure, in which highly magnetostrictive amorpho us FeCoSiB films deposited on a thin glass substrate mete bonded on PZ T piezoelectric substrates. When a dc voltage was applied to the eleme nt, large changes in magnetic properties of the PeCoSiB film were obse rved: for example, by applying de voltages ranging from -200V to +200V , change in magnetic permeability of the film reached about 1680%. It was also demonstrated that high frequency impedance of the element was subject to change with a de voltage. These unique characteristics of the elements are considered to be very attractive for constructing sma rt actuators with a sensing function.