Low noise FeAlSi soft magnetic under-layer for CoPtCrO double-layered perpendicular recording media

被引：15

作者：

Hikosaka, T

Nakamura, F

Oikawa, S

Takeo, A

Tanaka, Y

机构：

[1] Toshiba Corp, Data Storage Dev Ctr, Saiwai Ku, Kawasaki, Kanagawa 2128501, Japan

[2] Toshiba Corp, Data Storage Dev Ctr, Tokyo, Japan

来源：

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

关键词：

magnetic devices; magnetic films; magnetic noise; magnetic recording; perpendicular magnetic;

D O I：

10.1109/20.950908

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：

FeAlSi multi-layered structure successfully reduced the noise compared with a mono-layered film. Optical surface analyzer also revealed that the films did not show any clear magnetic domains of spike noise source in the whole disk. TEM image of low noise film showed wide grain boundaries between 200 to 500 nm diameter FeAlSi grain clusters. The coercivities of films were significantly reduced when they were laminated. Along with the cluster isolation effect, the interlayer magnetic coupling of the multi-layered FeAlSi films also effectively reduce the noise. Double-layered perpendicular medium with a CoPtCrO recording layer and a multi-layered FeAlSi soft under-layer showed 25.8 dB SNR at 400 kBPI and 0.36 mum read truck width, and 2.5 x 10(-7) BER on a spin stand was achieved.

引用

页码：1586 / 1588

页数：3