Effect of Mg interlayer on perpendicular magnetic anisotropy of CoFeB films in MgO/Mg/CoFeB/Ta structure

被引：35
|
作者：
Ma, Q. L. [1 ]
Iihama, S. [2 ]
Kubota, T. [1 ]
Zhang, X. M. [1 ]
Mizukami, S. [1 ]
Ando, Y. [2 ]
Miyazaki, T. [1 ]
机构：
[1] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Appl Phys, Sendai, Miyagi 9808579, Japan
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 12期
关键词：
Magnetism - Tantalum compounds - Iron compounds - Magnesium - Magnetic anisotropy - Cobalt compounds;
D O I：
10.1063/1.4754118
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effects of Mg metallic interlayer on the magnetic properties of thin CoFeB films in MgO/Mg (t(Mg))/CoFeB (1.2nm)/Ta structures were studied in this letter. Our experimental result shows that the CoFeB film exhibits perpendicular magnetic anisotropy (PMA) when the CoFeB and MgO layers are separated by a metallic Mg layer with a maximum thickness of 0.8 nm. The origin of PMA was discussed by considering the preferential transmission of the Delta(1) symmetry preserved by the Mg interlayer in crystallized MgO/Mg/CoFeB/Ta. In addition, the thin Mg interlayer also contributes to enhancing the thermal stability and reducing the effective damping constant and coercivity of the CoFeB film. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754118]
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页数：5
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