Abstract
The contribution of the M-H loop slope to the recording properties of double-layered perpendicular magnetic recording media was studied. Experimental results confirmed that the sharpness of the magnetization transition corresponded to the steepness of the M-H loop. The write sensitivity, S/N, and modulation overwrite also increased along with the recording resolution in media with steeper M-H loops. Though the nonlinear transition shift increased in media with an increased loop slope, the shift was dominated by the phase distortion, which could be minimized by phase precompensation.
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