Abstract
Elastically coupled magneto-electric (ME) elementswere constructed and their fundamental properties were studied,so as to examine whether the elements exhibit considerable MEeffect at room temperature. The elements had a hybrid structure,in which thin soft glass substrates with highly magnetostrictiveamorphous FeCoSiB films were bonded on lead zirconate titanate(PZT) piezoelectric substrates. When a direct current (dc) voltagewas applied to the element, large changes in the magneticproperties of the FeCoSiB film were observed. For example, byapplying a dc voltage from -200 V to + 200 V,changes in magnetic permeability of the film reached about1680%. It was also demonstrated that high-frequency impedanceof the element was subject to change with a dc voltage applied toPZT layer. These unique characteristics of the present MEelements are considered to be very attractive for constructingsmart actuators with a sensing function.
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