Abstract
Microwave-assisted magnetization reversal of 1.3×0.3×0.035 μm3 NiFe element with a natural ferromagnetic resonance frequency of 8.3 GHz was experimentally investigated by means of vector network analyzer ferromagnetic resonance measurement. The irreversible switching of magnetization after the application of ac magnetic field with an appropriate frequency was detected from a discontinuous increase of ferromagnetic resonance frequency in the NiFe element at a non-zero dc bias field. The switching field can be reduced from 300 to 192 Oe when the ac magnetic field with the frequency of 7GHz and the amplitude of 130 Oe is applied along the short axis of the NiFe element.
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