記録再生シミュレーションによるキーパー媒体の熱安定性評価(磁気記録)

概要

論文の詳細を見る
A read/write simulation based on the Poisson equation by a finite element method was performed on keepered media (KM) with a thin soft magnetic layer (keeper layer) under a recording layer and a thin-film head. An extended Stoner-Wohlfarth (SW) model was used for the recording layers, in which the switching rate of each SW particle at finite temperatures is taken into account using the Neel-Arrhenius law and the master equation. Thermal stability of the medium was estimated by the recorded magnetizations and the corresponding output voltage waveforms for 423 kBPI calculated at 300 K as a function of time t after the recording. Although the output voltage of the KM was slightly less than that of the conventional medium due to magnetic flux circulation through the keeper layer, the output voltage reduction rate due to thermal fluctuation decreased remarkably with a thin keeper layer.
社団法人日本磁気学会の論文
2004-04-01