Effect of the M-H Loop Slope on the Recording Properties of Perpendicular Magnetic Recording Media

摘要

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.