A magnetic readout technique is proposed that can extract a high-quality output from high-density recorded signals. The principle utilizes sharp RF permeability changes in a soft magnetic film due to a weak external field. This variation is caused by both magnetization rotation and ferromagnetic resonance. A magnetic readout head that operates on this principle was fabricated and evaluated using sinusoidal signals (0. 5-10 MHz) which were saturation-recorded on a magnetic tape with a ferrite ring head. Performance results are reported for the readout head.
|Number of pages||7|
|Journal||IEEE Translation Journal on Magnetics in Japan|
|Publication status||Published - 1985 Apr|
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