Investigation of perpendicular magnetic anisotropy of CoFeB by x-ray magnetic circular dichroism

被引：26

作者：

Tsai, W. C. ^{[1
]}

Liao, S. C. ^{[1
]}

Hou, H. C. ^{[1
]}

Yen, C. T. ^{[2
]}

Wang, Y. H. ^{[2
]}

Tsai, H. M. ^{[3
]}

Chang, F. H. ^{[3
]}

Lin, H. J. ^{[3
]}

Lai, Chih-Huang ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan

[2] Ind Technol Res Inst, Elect & Optoelect Res Lab, Hsinchu 31040, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 17期

关键词：

TUNNEL-JUNCTION; ORBITAL-MOMENT; FILMS; IRON;

D O I：

10.1063/1.4707380

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the variation of perpendicular magnetic anisotropy (PMA) of CoFeB layers with the oxidation degree of the MgO buffer layers. After annealing at 330 degrees C, the out-of-plane anisotropy field (H-k) of 1.5-nm CoFeB could be optimized to 3.1 kOe. To investigate the orbital hybridization of the Fe-3d and O-2p, the orbital moments per hole (m(orb)/N-h) of Fe in annealed CoFeB layers were extracted by using x-ray magnetic circular dichroism. The dependence of m(orb)/N-h on the oxidation time of MgO coincided with that of H-k, which revealed that PMA of annealed CoFeB originated from the interfacial orbital hybridization. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4707380]

引用

页数：4

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