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首页> 外文期刊>Physical review >Off-easy-plane antiferromagnetic spin canting in coupled FePt/NiO bilayer structure with perpendicular exchange bias
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Off-easy-plane antiferromagnetic spin canting in coupled FePt/NiO bilayer structure with perpendicular exchange bias

机译：具有垂直交换偏压的FePt / NiO双层结构中的离平面反铁磁自旋倾斜

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摘要

We report on the investigation of perpendicular exchange bias in FePt(001)/NiO(111) orthogonal exchange couple with FePt partially Llo ordered. From initial magnetization curve measurement and magnetic domain imaging, we find that, for the as-grown bilayer structure, the FePt layer experiences a small-angle magnetization rotation when it is magnetized near to saturation in film normal direction. After field cooling, the bilayer structure shows a significant enhancement of perpendicular magnetic anisotropy, indicating the field mediated coupling between the spins across the FePt/NiO interface. According to Koon's theoretical calculation on the basis of lowest energy ferromagnetic/antiferromagnetic coupling configuration for compensated spins at antiferromagnetic side, we consider slightly slanted Ni spins at the interface off the (111) easy plane can stabilize the spin coupling between FePt and NiO and result in the observed exchange bias in this paper. This consideration was further confirmed by stripe domain width calculation.
机译：我们报告FePt（001）/ NiO（111）正交交换耦合中的FePt部分Llo有序的垂直交换偏压的研究。从初始磁化曲线测量和磁畴成像，我们发现，对于成层的双层结构，当FePt层在薄膜法线方向上接近饱和时，会经历小角度的磁化旋转。磁场冷却后，双层结构显示出垂直磁各向异性的显着增强，表明跨FePt / NiO界面的自旋之间的场介导耦合。根据Koon基于最低能量铁磁/反铁磁耦合结构在反铁磁侧补偿自旋的理论计算，我们认为在（111）易平面外的界面处略微倾斜的Ni自旋可以稳定FePt和NiO之间的自旋耦合，结果本文观察到的汇率偏差。条带域宽度计算进一步证实了这一考虑。

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  • 来源
    《Physical review》 |2016年第5期|054412.1-054412.5|共5页
  • 作者

    Tenghua Gao; Nobuhide Itokawa; Jian Wang; Youxing Yu; Takashi Harumoto; Yoshio Nakamura; Ji Shi;

  • 作者单位

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8552, Japan;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8552, Japan;

    National Institute of Materials Science (NIMS), Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan;

    School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8552, Japan;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8552, Japan;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8552, Japan;

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