李鹏

个人信息Personal Information

特任教授

博士生导师

硕士生导师

教师拼音名称:Li Peng

电子邮箱:

职务:特任教授

办公地点:安徽省合肥市金寨路96号北校区融合楼213室

联系方式:+86(0551)63607785

学位:博士

毕业院校:美国圣母大学University of Notre Dame

学科:电子科学与技术

论文成果

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Effects of growth order on perpendicular magnetic anisotropy of heavy metal/ferromagnet/MgO tri-layered structures

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发表刊物:IEEE Magn. Lett.

关键字:Spin Electronics, Nanomagnetics, Information StorageCoupled Phenomena.

摘要:Previous experiments have shown that perpendicular magnetic anisotropy (PMA) in tri-layers consisting of a CoFeB layer, an MgO layer, and a nonmagnetic metal (NM) layer depends strongly on whether the CoFeB layer was grown on the top of NM layer or was capped by a NM layer. In this work, we studied the physical origin of this phenomenon through firstprinciples calculations. We took MgO/CoFe/Ta and Ta/CoFe/MgO as model structures and analyzed the magnetic anisotropy energy (MAE) therein. We found that the “substrate/Ta/CoFe/MgO” structure had a notably higher MAE than the “substrate/MgO/CoFe/Ta” structure. This difference results mainly from different stresses in the Ta layers, and the latter gives rise to a difference in the hybridization strength of in-plane orbits ( xy d , 2 2 x y d  , x p and y p ). We also found that the p orbital hybridization in the Ta layers contributes significantly to the PMA in both structures.

论文类型:期刊论文

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发表时间:2019-11-12