Demonstration of 35 Gbits/in2 in media on glass substrates

被引:35
作者
Doerner, M [1 ]
Bian, XP
Madison, M
Tang, K
Peng, QZ
Polcyn, A
Arnoldussen, T
Toney, MF
Mirzamaani, M
Takano, K
Fullerton, E
Margulies, D
Schabes, M
Rubin, K
Pinarbasi, M
Yuan, S
Parker, M
Weller, D
机构
[1] IBM Corp, Storage Technol Div, San Jose, CA 95193 USA
[2] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA
关键词
crystallographic texture; density limits; grain size; magnetic recording media; thermal stability;
D O I
10.1109/20.917191
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
A recording density of 35 Gbits/in(2) was achieved in longitudinal recording media with high-sensitivity GMR heads. The media displayed excellent thermal stability as a result of a CoPtCrB alloy with high magnetocrystalline anisotropy and relatively narrow grain size distribution. The degree of Co easy-axis orientation in the plane of the film was greatly improved and the grain size was reduced in the media on glass substrates, Estimates of the switching volume from dynamic coercivity and signal-to-noise measurements are larger than the physical grain size, suggesting that intergranular interactions improve stability. A potential path to further increases in recording density above 35 Gbits/in(2) is to use antiferromagnetically coupled magnetic layers in the media.
引用
收藏
页码:1052 / 1058
页数:7
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