The study of perpendicular magnetic anisotropy in CoFeB sandwiched by MgO and tantalum layers using polarized neutron reflectometry
The study of perpendicular magnetic anisotropy in CoFeB sandwiched by MgO and tantalum layers using polarized neutron reflectometry
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使用偏振中子反射法研究夹有 MgO 和钽层的 CoFeB 的垂直磁各向异性
DOI：
10.1063/1.4718423
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发表时间：
2012-05-14
影响因子：
4
通讯作者：
Xiao, J. Q.
中科院分区：
文献类型：
--
作者：
Zhu, T.;Yang, Y.;Xiao, J. Q.
用反常霍尔效应和偏振中子反射仪研究了夹有氧化镁和钽层的CoFeb的垂直磁各向异性(PMA)。研究发现，与氧化层以下的铁氧体相比，氧化层以上的CoFeB中存在较大的PMA与其较低的磁化强度有关。利用中子对B吸收截面的敏感性，我们明确地确定了B分布的深度分布，结果表明，大部分B在热处理后扩散，在CoFeB层和Ta层之间形成了2 nm厚的界面层。(C)2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4718423]
The perpendicular magnetic anisotropy (PMA) in CoFeB sandwiched by MgO and tantalum layers was investigated using anomalous Hall effect and polarized neutron reflectometry. It was found that a large PMA in the CoFeB above MgO layer was related to its low magnetization compared to the case of CoFeB under MgO layer. Using the sensitivity of neutrons to the absorption cross-section of boron, we unambiguously determined the depth profile of the boron distribution and showed that after annealing, most of the boron diffused to form a 2-nm-thick interface layer between the CoFeB and tantalum layers. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718423]