Abstract
Medium noise characteristics and transition jitter in perpendicular magnetic recording are explored using micromagnetic simulation. A noise plateau for intermediate recording densities is observed for a recording layer of typical magnetization. The plateau is replaced by a normal linear dependence of noise on recording density for a low magnetization recording layer. We show analytically that a source of the plateau is similar to that producing the non-linear transition shift of signal. In particular, magnetostatic effects are predicted to produce positive correlation of jitter and thus negative correlation of noise at the densities associated with the plateau.
| Original language | English (US) |
|---|---|
| Article number | 5257220 |
| Pages (from-to) | 3714-3717 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 45 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2009 |
Bibliographical note
Funding Information:The authors thank T. Arnoldussen for experimental data and several valuable discussions. They also thank Seagate Technology for funding this work.
Keywords
- Demagnetizing field
- Micromagnetic simulation
- Non-linear transition shift
- Perpendicular media
- Position jitter