Abstract
Magneto-surface-acoustic wave (MSAW) devices, whose phase can be widely controlled over 2000°/cm with a magnetic field smaller than about 100 A/cm, were constructed by utilizing the Love-type MSAW propagating in amorphous FeB multilayer films separated from each other by thin SiO x layers. Both FeB films and SiO x layers were rf-sputtered successively on soda-lime glass substrates. This pronounced characteristic is due to the facts that Love-type SAW propagating in substrate couples strongly to magnetization of magnetic films and the insertion of insulating layers works effectively to suppress the eddy-current which is generated by magnetic induction arising from the propagation of MSAW in a conductive alloy film.
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