Magnetization dynamics is a typical non-linear phenomenon, which is strongly influenced by theconditions of applied DC and RF magnetic fields. We have investigated the utilization of the property for thepossible application of a highly sensitive magnetic sensor by detecting the phase change of magnetizationdynamics. We successfully obtained the maximum phase change of 50 °/Oe, showing the potential for thedetection of bio-magnetic fields. Interestingly, we found that the geometry of high frequency waveguidestrongly influenced the magnetization dynamics.
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