Magnetooptical recording technology toward 100 Gb/in2

被引：26

作者：

Awano, H ^{[1
]}

Ohta, N ^{[1
]}

机构：

[1] Hitachi Maxell Ltd, Tsukuba Res Lab, Tsukuba, Ibaraki 30524, Japan

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 1998年 / 4卷 / 05期

关键词：

domain collapse; domain dynamics; domain expansion; domain wall velocity; GdFeCo; magnetic domain expansion readout; magnetooptical disk; magnetooptical recording; MAMMOS; TbFeCo;

D O I：

10.1109/2944.735766

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：

Concerning areal recording density, magnetooptical (MO) disk possesses an advantage compared to another optical disks and also magnetic hard disk (HDD), since the linear density of MO disk can be increased by using a perpendicular magnetic recording, and the track density also can be increased by using an optical tracking method. On the other hand, in the region of high density HDD, demagnetization problem is discussed for archival data storage. However, since the coercive force of MO recording material is over five times larger than that of HDD, it does not become such a sever problem for MO recording. Zn ease of very-high-density recording, the readout signal is drastically reduced due to decreasing both the recorded domain size and the optical resolution. However, in the case of MO, the small readout signal can be enhanced by using a novel readout technique named as magnetic amplifying MO system and the extremely small signal also can be detected. Thus, it is found that the MO has probability of achieving an extremely high density storage such as 100 Gb/in(2).

引用

页码：815 / 820

页数：6

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