Large perpendicular magnetic anisotropy at Fe/MgO interface

被引：107

作者：

Koo, J. W. ^{[1
,2
]}

Mitani, S. ^{[1
,2
]}

Sasaki, T. T. ^{[2
]}

Sukegawa, H. ^{[2
]}

Wen, Z. C. ^{[2
]}

Ohkubo, T. ^{[2
,3
]}

Niizeki, T. ^{[1
,2
]}

Inomata, K. ^{[2
]}

Hono, K. ^{[1
,2
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050006, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Tokyo Univ Sci, Dept Mat Sci & Technol, Fac Ind Sci & Technol, Tokyo 1258585, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 19期

关键词：

Magnetic anisotropy - Magnetism - Thermodynamic stability - Iron - Magnetic storage;

D O I：

10.1063/1.4828658

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A large perpendicular magnetic anisotropy (PMA) of 1.4 MJ/m(3) was observed from ultrathin Fe/MgO(001) bilayers grown on Cr-buffered MgO(001). The PMA strongly depends on the surface state of Fe prior to the MgO deposition. A large PMA energy density of 1.4 MJ/m(3) was achieved for a 0.7 nm thick Fe layer having adsorbate-induced surface reconstruction, which is likely to originate from oxygen atoms floating up from the Cr buffer layer. This large magnitude of PMA satisfies the criterion that is required for thermal stability of magnetization in a few tens nanometer-sized magnetic memory elements. (C) 2013 AIP Publishing LLC.

引用

页数：4

共 18 条

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