FePt-C graded media for ultra-high density magnetic recording

被引：25

作者：

Chen, J. S. ^{[1
]}

Huang, L. S. ^{[1
,2
]}

Hu, J. F. ^{[2
]}

Ju, G. ^{[3
]}

Chow, G. M. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117608, Singapore

[2] Agcy Sci Technol & Res, Data Storage Inst, Singapore 117608, Singapore

[3] Seagate Technol, Fremont, CA 94538 USA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2010年 / 43卷 / 18期

关键词：

EXCHANGE;

D O I：

10.1088/0022-3727/43/18/185001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Tri-layer FePt-C graded media composed of three FePt-C layers with each single FePt-C layer deposited at different substrate temperatures were fabricated. The single hard layer FePt-C had a large coercivity of 11.4 kOe, while the coercivity of the tri-layer sample was only 5.7 kOe. A coercivity reduction factor of 2 was achieved without sacrificing the thermal stability of the media. The tri-layer media revealed incoherent magnetization switching-domain wall propagation. The microstructure showed that the tri-layer FePt-C graded media were graded media combined with modified coupled granular continuous (CGC) media. This new kind of graded media had a lower switching field and comparable thermal stability and should have the advantage of CGC media-lower transition noise.

引用

页数：5

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