Patent ID: 6232850
Filing Date: 2001-05-15
Classification: H03H

Abstract:
A magnetostatic wave device comprising:a Gd.sub.3 Ga.sub.5 O.sub.12 substrate off-angled from a {110} plane;a magnetic thin film including a crystal of garnet and being formed on the Gd.sub.3 Ga.sub.5 O.sub.12 substrate by liquid-phase epitaxy;a transducer for exciting magnetostatic wave in the magnetic thin film in response to an RF electric signal; andmeans for applying a bias magnetic field to the magnetic thin film;wherein there is a relation as 20.degree..ltoreq..vertline..theta..sub.1 +.theta..sub.2.vertline..ltoreq.35.degree., where "".theta..sub.1 "" denotes an angle between a longitudinal direction of the transducer and a <001> orientation of the crystal in the magnetic thin film, and "".theta..sub.2 "" denotes an angle between a transverse direction of the transducer and a specified direction, the specified direction being parallel to a line of intersection between a horizontal plane of the magnetic thin film and a given plane which is perpendicular to the horizontal plane of the magnetic thin film and which contains a direction of the bias magnetic field; andwherein there is a relation as .vertline..theta..sub.3.vertline..ltoreq.75.degree., where "".theta.3"" denotes an angle between the specified direction and the direction of the bias magnetic field.