Effect of competing energies on the transition noise of oriented magnetic media

There has been some disagreement in observation of the effect of oriented media on the recording performance from earlier and recent studies. In this letter, we have identified the reasons behind these disagreements by studying the effect of the energy ratio of local anisotropy (K-u) and long range magnetostatic interaction energies (K-d) (Q=K-u/K-d). The magnetization reversal mechanism is observed to be different in the recorded bit transition of different magnetic properties (Q) of the media. The results on the effect of Q and the linear density of various oriented media are presented and discussed in detail. It is observed that the transition for high Q media does not follow arctan transition form. Oriented high Q media show better recording performance than isotropic media, even at higher linear density. (C) 2002 American Institute of Physics.