Track edge overwrite and easy axis orientation in narrow track recording

Micromagnetic modeling is utilized to study the track edge overwrite characteristics and correlations with grain easy axes orientation in longitudinal thin film recording media. The authors compare well-oriented films with planar isotropic films. It is found that for well-oriented films, the side-written band contains signal-related magnetic pole density. The pole density patterns exhibit strong dependence on previously written transitions at track edges. For planar isotropic media, edge overwrite simulation shows a clear side erase band. Read-back voltage waveforms are analyzed. A planar isotropic film shows much better off-track properties than an oriented film