Large perpendicular magnetic anisotropy at Fe/MgO interface
Large perpendicular magnetic anisotropy at Fe/MgO interface
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DOI：
10.1063/1.4828658
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发表时间：
2013-11-04
影响因子：
4
通讯作者：
Hono, K.
中科院分区：
文献类型：
--
作者：
Koo, J. W.;Mitani, S.;Hono, K.
在Cr缓冲MgO（001）衬底上生长的Fe/MgO（001）双层膜中，观察到了1.4MJ/m（3）的垂直磁各向异性（PMA）。PMA强烈地依赖于MgO沉积之前Fe的表面状态。对于具有吸附物诱导的表面重构的0.7nm厚的Fe层，实现了1.4MJ/m（3）的大PMA能量密度，这可能源于从Cr缓冲层浮起的氧原子。这种大幅度的PMA满足几十纳米尺寸的磁存储元件中的磁化的热稳定性所需的标准。(C)2013 AIP Publishing LLC.
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.