Fh. Liu et al., HIGH-FREQUENCY MAGNETIZATION RESPONSE OBSERVED AT THE AIR-BEARING SURFACES OF THIN-FILM HEADS, IEEE transactions on magnetics, 32(5), 1996, pp. 3536-3538
Magnetization response during high frequency and high amplitude write
current excitations at the air-bearing surfaces (ABS) of thin film ind
uctive and MR write heads were observed by using a Scanning Kerr Effec
t Microscope, Under certain excitation conditions, bubble-like dynamic
domain walls that separate the regions of 180 degrees out-of-phase ma
gnetization reversals were observed predominately at the ABS of traili
ng poles (P2). This magnetization reversal mechanism is believed to be
introduced by the combined effects of eddy current damping and local
magnetization saturation, and is consistent with the model proposed by
Wood and Williams.