An analysis of perpendicular magnetic recording using a newly developed 2D-FEM combined with a medium magnetization model

In order to analyze perpendicular magnetic recording mechanisms, the authors have developed a 2-D FEM (finite-element method) simulation program in which a vectorial magnetization of magnetic particles is introduced into the calculation of magnetization distributions in a recording media. This program makes a physically accurate simulation of magnetic recording and reproducing processes because not only the magnetic nonlinearity of head and medium but also the head-to-medium magnetic interaction are taken into account. It is confirmed quantitatively by the program that stronger head-to-medium magnetic interaction produces a sharper magnetization transition and a higher reproduced voltage at higher recording densities