Magnetically aligned 2D rectangular micro magnets with uniaxial in-plane anisotropy for high frequency magnetic devices

The design and demonstration of magnetically aligned 2D rectangular micro magnets have been developed for high frequency magnetic devices. It is known that 2D magnetic structures and the induced anisotropy can provide unique properties to achieve high magnetic resonance frequency. A methodology to fabricate the 2D micro magnets using the microfabrication processes with magnetic field alignment has been proposed and successfully demonstrated. In-plane anisotropy from the drop casted magnet arrays has been confirmed. Compared to a blanket NiFe thin film, the 2D magnet arrays is found to increase the anisotropy field 30 times from 10 to 300 Oe, or 5.5 times higher magnetic resonance frequency from 0.45 to 2.5 GHz.