Giant magnetic anisotropy in tetragonal FeCo alloys -: art. no. 027203

被引：314

作者：

Burkert, T

Nordström, L

Eriksson, O

Heinonen, O

机构：

[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden

[2] Seagate Technol, Bloomington, MN 55435 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.93.027203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to further increase the recording density in hard disk drives, new media materials are required. Two essential parameters of future recording media are a large uniaxial magnetic anisotropy energy (MAE) K-u and a large saturation magnetization M-s. Based on first-principles theory, we predict that very specific structural distortions of FeCo alloys possess these desired properties. The discovered alloy has a saturation magnetization that is about 50% larger than that of FePt-a compound that has received considerable attention lately-with a uniaxial MAE that can easily be tailored reaching a maximum value that is 50% larger than that of FePt.

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页码：027203 / 1

页数：4

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