A theoretical study of an isolated transition using an iterative hysteretic model

Recently Iwasaki and Suzuki pointed out that demagnetization could conceivably be very significant during the writing process and presented a self-consistent iterative calculation of the writing process which confirmed their views. In the present study we extend their scheme to study an isolated transition region of finite track width by considering what happens to the transition when the head field is removed. Of particular significance in the final calculated results is the high asymmetry of the magnetization distribution. A detailed comparison was done between the results of the iterative calculation and previous theories of the transition region over a large range of material parameters. It is found that the iteratively calculated transition regions are significantly larger than those calculated by previous authors. Results are also compared to experimental data obtained by electron microscopy.