TY - JOUR
T1 - Experimental study of nonlinear transition shift in perpendicular magnetic recording with single-pole head
AU - Muraoka, Hiroaki
AU - Nakamura, Yoshihisa
PY - 1997
Y1 - 1997
N2 - Nonlinear phenomena in perpendicular magnetic recording employing a single-pole head and a doublelayered medium were investigated. First, measurement of linear superposition in the time domain indicated that the amount of nonlinear transition shift (NLTS) was less than 10 nm. It was concluded that the nonlinearity was caused by transition shift, not by waveform distortion. By interpreting the results, we proved that the NLTS was strongly related with head field gradient and interference field from recorded magnetization. Dependence on head parameter was examined by experiments. Based on the results, a single-pole head with which transition shift can be reduced was proposed. Pseudo-random sequence analysis revealed that NLTS was several percent even at 318 kFRPI, or at a bit interval of 80 nm, which agreed with the result of measurement of linear superposition in the time domain analysis. Experiments showed that NLTS increases the shortest bit length, in contrast with the case of longitudinal recording.
AB - Nonlinear phenomena in perpendicular magnetic recording employing a single-pole head and a doublelayered medium were investigated. First, measurement of linear superposition in the time domain indicated that the amount of nonlinear transition shift (NLTS) was less than 10 nm. It was concluded that the nonlinearity was caused by transition shift, not by waveform distortion. By interpreting the results, we proved that the NLTS was strongly related with head field gradient and interference field from recorded magnetization. Dependence on head parameter was examined by experiments. Based on the results, a single-pole head with which transition shift can be reduced was proposed. Pseudo-random sequence analysis revealed that NLTS was several percent even at 318 kFRPI, or at a bit interval of 80 nm, which agreed with the result of measurement of linear superposition in the time domain analysis. Experiments showed that NLTS increases the shortest bit length, in contrast with the case of longitudinal recording.
KW - Nonlinearity
KW - Perpendicular magnetic recording
KW - Single-pole head
KW - Transition shift
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M3 - Article
AN - SCOPUS:0031221673
VL - E80-C
SP - 1187
EP - 1192
JO - IEICE Transactions on Electronics
JF - IEICE Transactions on Electronics
SN - 0916-8524
IS - 9
ER -