Writing process on a permeable recording layer: A fundamental issue in perpendicular recording

Li, Shaoping; Wang, Lei
March 2003
Applied Physics Letters;3/24/2003, Vol. 82 Issue 12, p1896
Academic Journal
Normally, the head field is calculated without considering the influence of the recording layer, causing some inaccuracies on certain occasions. In this work, we describe the writing process on a permeable, perpendicular recording medium from both a simple reluctance analysis and complete micromagnetic simulations. It is found that: (i) the initial writing field is always reduced in perpendicular recording scheme, and the head-field rise-time could be somewhat prolonged in the presence of the permeable recording media, (ii) the writing field at saturation could be enhanced up to 10%-20%.


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