Low noise properties and thermal stability of Co-based thin film media for high density longitudinal recording

被引：6

作者：

Abarra, EN ^{[1
]}

Okamoto, I ^{[1
]}

Sato, K ^{[1
]}

Yoshida, Y ^{[1
]}

Akimoto, H ^{[1
]}

Uematsu, Y ^{[1
]}

机构：

[1] Fujitsu Ltd, File Mem Lab, Atsugi, Kanagawa 2430197, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2000年 / 36卷 / 01期

关键词：

longitudinal magnetic recording media; low noise properties; thermal stability; 20 Gbit/in(2) recording;

D O I：

10.1109/20.824430

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：

Media with excellent signal to noise properties and adequate high temperature thermal stability have been developed for over 20 Gbit/in(2) recording. The media are fabricated by de magnetron sputtering onto textured NiP films on AI-Mg substrates, The magnetic layer is a CoCr-based quaternary alloy with (11.0) preferred orientation on a Cr alloy (002) underlayer, The average grain diameter has been reduced to an average of < 10 nm, TEM-EDX studies revealed that Cr segregation has been enhanced compared to a previous CoCrPtTa media used for 15 Gbit/in(2) recording resulting in improved Co to Cr core composition and increased grain boundary Cr content. Spinstand measurements of the thermal decay after annealing at 65 degrees C indicate sufficient thermal stability at 400 kfci for media with Mr delta > 0.3 memu/cm(2) consistent with magnetometry measurements.

引用

页码：86 / 91

页数：6

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