Enhancement of Recording using Magnetic Resonance

To overcome the super-paramagnetic limit, materials with high anisotropy, such as FePt, has been proposed for media with areal density above 1 TBits/in². However, current writing field strength is insufficient for materials with such high anisotropies. Hence writing capability is the most urgent issue for high density recording and novel recording methods such as heat assisted recording and ferromagnetic resonance has been proposed as alternatives to current technology. In this work, we investigate several ferromagnetic resonance writing schemes and showed that it is effective for areal density up to 4TBits/in².