Thermal demagnetization analysis of CoPt magnetic recording medium by magneto-optical recording test

被引：4

作者：

Kikitsu, A ^{[1
]}

Nagase, T ^{[1
]}

Maeda, T ^{[1
]}

Tatsuta, S ^{[1
]}

Akiyama, J ^{[1
]}

机构：

[1] Toshiba Corp, Ctr Corp Res & Dev, Kawasaki, Kanagawa 2128582, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2001年 / 37卷 / 04期

关键词：

granular recording medium; magnetic recording; thermal fluctuation; thermally-assisted magnetic recording;

D O I：

10.1109/20.950809

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The thermal demagnetization process of granular CoPt perpendicular magnetic recording medium was studied by a magneto-optical recording test. Signals from recorded magnetic domains decreased by continuous laser irradiation at relatively high power. This phenomenon was caused by an acceleration of the thermal decay of written domains, which might become a crucial issue for the design of a thermally-assisted magnetic recording system. A new simple model was proposed for the analysis of the thermal degradation of this experiment. This model was in good agreement with the experimental results. According to this model, an enhancement of areal density by employing the thermally-assisted recording was roughly estimated. For the case of the examined samples, the enhancement of the areal density was about two. Possible ways to avoid the acceleration were also discussed using this model.

引用

页码：1250 / 1253

页数：4