Title :
Magnetostatic wave ring resonator with a rotating thin film
Author :
Saunders, Andrea E. ; Stancil, Daniel D.
Author_Institution :
Magnetics Technol. Center, Carnegie-Mellon Univ., Pittsburgh, PA, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
A magnetostatic-wave ring resonator with a rotating thin film has been constructed, and its use as a rotation rate sensor has been investigated. Measurements were made between 1.0 and 1.5 GHz. Large orientation-dependent phase and amplitude variations were observed that masked velocity-dependent effects. The variations are attributed to magnetocrystalline anisotropy and preclude the use of the device as a rotation rate sensor. However, the phase shift through the device was found to vary with temperature at a rate of -9.8 degrees/°C, suggesting that it could be used as a noncontacting temperature sensor for rotating bodies
Keywords :
angular velocity measurement; garnets; magnetic thin film devices; magnetostatic wave devices; nonelectric sensing devices; resonators; solid-state microwave devices; temperature measurement; yttrium compounds; 1 to 1.5 GHz; YFe5O12; YIG film; amplitude variations; magnetocrystalline anisotropy; magnetostatic-wave ring resonator; noncontacting temperature sensor; phase shift; phase variations; rotating thin film; rotation rate sensor; Magnetic anisotropy; Magnetic devices; Magnetic sensors; Magnetostatic waves; Optical ring resonators; Perpendicular magnetic anisotropy; Sensor phenomena and characterization; Temperature sensors; Thin film sensors; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
