孤立遷移の記録・再生シミュレーション : 磁気記録再生特性

概要

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To attain high-density magnetic recording, the parameter a of an isolated transition, which defines the sharpness of the recorded magnetization pattern in the transition region, has to be made small as possible. Here, the values of parameter a are estimated by fitting an arctangent or a hyperbolic tangent function to the recorded magnetization patterns calculated by a finite element R/W simulation solving the Poisson equation for the two-dimensional model of a thin-film head and various media, and compared with those obtained by the analytical formula derived by using the Willams-Comstock and Hokkyou (W-C-H) model. As a result, the calculated recorded magnetization patterns are found to be fitted quite well by a hyperbolic tangent function using the parameter a estimated by using the W-C.H model, and the calculated half-amplitude pulse width PW_<50> 's are found to coincide well with those estimated from an analytical formula obtained by using the reciprocal theorem assuming the Karlqvist head field and an arctangent magnetization pattern.
社団法人日本磁気学会の論文
2002-04-01