Theory of perpendicular magnetocrystalline anisotropy in Fe/MgO (001)

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:414

Article

Odkhuu, Dorj^1,2,3  Yun, Won Seok^1,2,4  Rhim, S. H.^1,2  Hong, Soon Cheol^1,2 

[1] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[2] Univ Ulsan, Energy Harvest Storage Res Ctr, Ulsan 680749, South Korea

[3] Incheon Natl Univ, Dept Phys, Inchon 406772, South Korea

[4] DGIST, Dept Emerging Mat Sci, Daegu 711873, South Korea

关键词: Fe/MgO;    Magnetocrystalline anisotropy;    Spin-orbit coupling;   

DOI  :  10.1016/j.jmmm.2016.04.027

来源: Elsevier

【 摘 要 】

The origin of large perpendicular magnetocrystalline anisotropy (PMCA) in Fe/MgO (001) is revealed by comparing Fe layers with and without the MgO. Although Fe-O p-d hybridization is weakly present, it cannot be the main origin of the large PMCA as claimed in previous study. Instead, perfect epitaxy of Fe on the MgO is more important to achieve such large PMCA. As an evidence, we show that the surface layer in a clean free-standing Fe (001) dominantly contributes to E-MCA, while in the Fe/MgO, those by the surface and the interface Fe layers contribute almost equally. The presence of MgO does not change positive contribution from < xz vertical bar l(z)vertical bar yz >, wherease it reduces negative contribution from < z(2)vertical bar l(x)vertical bar yz > and < xy vertical bar l(x)vertical bar xz, yz >. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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