Influence of Ta insertions on the magnetic properties of MgO/CoFeB/MgO films probed by ferromagnetic resonance
Influence of Ta insertions on the magnetic properties of MgO/CoFeB/MgO films probed by ferromagnetic resonance
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DOI：
10.7567/apex.7.093002
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发表时间：
2014-09-01
影响因子：
2.3
通讯作者：
Tran, Michael
中科院分区：
文献类型：
--
作者：
Sabino, Maria Patricia Rouelli;Ter Lim, Sze;Tran, Michael
我们通过矢量网络分析仪铁磁共振测量表明，在CoFeB层中插入超薄Ta的垂直磁化MgO/CoFeB/MgO薄膜中，可以实现低至0.006的吉尔伯特阻尼系数α。尽管增加Ta插入的数量能使更厚的CoFeB层保持垂直，但有效面磁各向异性并不会随着插入数量的增加而提高，而且α还会增大。（C）2014日本应用物理学会
We show by vector network analyzer ferromagnetic resonance measurements that low Gilbert damping alpha, down to 0.006, can be achieved in perpendicularly magnetized MgO/CoFeB/MgO thin films with ultrathin insertions of Ta in the CoFeB layer. Although increasing the number of Ta insertions allows thicker CoFeB layers to remain perpendicular, the effective areal magnetic anisotropy does not improve with more insertions, which also come with an increase in alpha. (C) 2014 The Japan Society of Applied Physics