高周波NLTSにおけるライトヘッド特性の影響  [in Japanese] Effect of Write Head Properties on High-Frequency NLTS  [in Japanese]

Non-linear transition shift (NLTS) increases repidly with an increase in the write frequency. We investigated the relation between the frequency characteristics of NLTS and the write head properties, and proposed a new mechanism whereby high-frequency NLTS depends on the field rise time, not on the spatial field gradient. It is shown that NLTS decreases with an increase in resostovity, a shortening of the yoke length, and an increase in the effective write current. It is also shown that a main factor in NLTS is the write time shift caused by the difference between the first bit and second bit rise times of the write field.