Magnetostatic wave ring resonator with a rotating thin film

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/ degrees C, suggesting that it could be used as a noncontacting temperature sensor for rotating bodies.<
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