Patent ID: 6157507
Filing Date: 2000-12-05
Classification: G11B

Abstract:
A performance evaluation method of an MR (Magnetic-Resistance) head comprising:obtaining an isolated reproduction wave form V(t) by reading a single magnetization transition recorded on a recording medium with the MR head;calculating an order value P which gives a most likelihood approximation of the isolated reproduction wave form V(t) by a following equation,V(t)=1/(1+(2t/PW50).sup.P),t denoting time difference from a timing which gives a peak value of the isolated reproduction wave form V(t), and PW50 denoting a half-peak-width where the isolated reproduction wave form V(t) shows more than 50% of the peak value; andevaluating resolution performance of the MR head according to the order value P and the half-peak-width PW50 relative to a minimum bit-interval to be reproduced by the MR head.