NiO-thickness dependent magnetic anisotropies in Fe/NiO/Au(001) and Fe/NiO/MgO(001) systems

NiO-thickness dependent magnetic anisotropies in Fe/NiO/Au(001) and Fe/NiO/MgO(001) systems
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Fe/NiO/Au(001) 和 Fe/NiO/MgO(001) 体系中 NiO 厚度相关的磁各向异性

DOI:
10.1016/j.jmmm.2011.08.034
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发表时间:
2012-02
影响因子:
2.7
通讯作者:
Wu, Y. Z.
Wu, Y. Z.
中科院分区:
材料科学3区
文献类型:
--
作者:
Ma, L. Y.;Chen, G.;Li, J.;Zhu, J.;Qiu, Z. Q.;Wu, Y. Z.

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The in-plane magnetic anisotropy of Fe/NiO bilayers was studied quantitatively as a function of NiO thickness using the magneto-optical Kerr effect with a rotating field. For NiO thicker than the ordering transition thickness, the total in-plane fourfold anisotropy of the Fe layer decreases with NiO thickness in Fe/NiO/Au(001), but increases in Fe/NiO/MgO(001). Our result indicates that the exchange coupling in an Fe/NiO bilayer might induce an additional in-plane fourfold anisotropy, and the opposite thickness dependent behaviors may be attributed to the different Ni2+antiferromagnetic spin orientations for NiO films grown on Au(001) and MgO(001) surfaces.
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