AFC媒体の記録再生特性に対する下部記録層の保磁力依存性(磁気記録)

概要

論文の詳細を見る
A finite element read/write simulation was performed by solving the Poisson equation for a two-dimensional model of an antiferromagnetically coupled magnetic medium (AFC medium) and a thin-film-head system. The AFC medium is composed of two recording layers (top recording L1 layer, bottom recording L2 layer) and a thin intervening Ru layer. From a simulation of a di-bit pattern, we found that (1) when the coercive force H_<c0> (L1) is smaller than H_<c0> (L2), the L1 magnetization just recorded is rewritten by the applied reverse head field, and an extra-bit region appears in L1, (2) the extrabit is consolidated into a di-bit in L2 with increasing time, (3) the effect of the extrabit appears as a distortion in the output waveform, and (4) with increasing time, the output waveform changes so that its polarity becomes opposite to that at t=0sec. From the simulation at 423 kFRPI, it was found that (5) when H_<c0> (L2) is small or large compared with H_<c0> (L1), the thermal stability is improved at a finite small interlayer antiferromagnetic exchange coupling, and (6) for H_<c0>(L1) ≒ H_<c0>(L2), the thermal stability is improved with much larger interlayer antiferromagnetic exchange coupling.
社団法人日本磁気学会の論文
2005-03-01