Graded Media Design for Area Density of Up to 2.5 Tb/in2

被引：5

作者：

Hahn, David ^{[2
]}

Bashir, Muhammad Asif ^{[1
]}

Schrefl, Thomas ^{[1
,2
]}

Cazau, Alexandru ^{[3
]}

Gubbins, Mark A. ^{[3
]}

Suess, Dieter ^{[4
]}

机构：

[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

[2] St Polten Univ Appl Sci, A-3100 St Polten, Austria

[3] Seagate Technol, Derry BT48 0BF, North Ireland

[4] Vienna Univ Technol, A-1040 Vienna, Austria

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2010年 / 46卷 / 06期

关键词：

Domain wall nucleation; domain wall propagation; graded media; perpendicular magnetic recording; EXCHANGE SPRING MEDIA;

D O I：

10.1109/TMAG.2009.2039922

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：

Feasibility of perpendicular magnetic recording up to an area density of 2.5 Tb/in(2) is investigated. Magnetic grains of 4 nm diameter with 1 nm oxide layer are required to achieve such a high density. Thermal stability of the grains is achieved by increasing the overall thickness of the grain. Magnetocrystalline anisotropy is graded within a grain in such a way that nucleation and propagation of the reversed domain wall matches with the available head field. Different design specifications are investigated to achieve higher objective function, i.e., energy barrier per switching field.

引用

页码：1866 / 1868

页数：3

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