垂直磁気記録方式における記録再生・熱減磁特性予測

概要

論文の詳細を見る
Perpendicular magnetic recording is expected to be a prominent candidate for ultra-high-density recording at more than 100 Gb/in^2. We have developed an analytical method for estimating the read/write performance and thermal decay characteristics. This report focuses discussion on the analysis of low-frequency relaxation process such as hysteresis loops and magnetization decay. The magnetization reversal induced by thermal energy was calculated using Neel-Arrhenius-type model. The calculation conditions which reproduced a practical hysteresis loop could predict the thermal decay characteristics of the written pattern. The accuracy of this estimation is verified by the data from a 52.5 Gb/in^2 demonstration, and the specifications for an areal recording density of 100 Gb/in^2 is proposed based on this analysis.
2001-04-15