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首页> 外文期刊>Japanese journal of applied physics >Effects of post-deposition magnetic field annealing on magnetic properties of NiO/Co_(90)Fe_(10) bilayers
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Effects of post-deposition magnetic field annealing on magnetic properties of NiO/Co_(90)Fe_(10) bilayers

机译：沉积后磁场退火对NiO / Co_（90）Fe_（10）双层磁性的影响

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摘要

The ferromagnetic (FM)/antiferromagnetic (AF) bilayer structures have drawn intensive attention because of their wide applications in modern spintronic devices. While abundant published works have been reported on the interface effects of the FM/AF bilayers caused by the magnetic field annealing (MFA) process, the volume effects caused by the MFA treatment have been rarely considered. In this work, the microstructural and magnetic properties of the NiO/CoFe bilayers with various CoFe thicknesses were investigated under different annealing temperatures. At high annealing temperature, the interlayer mixing and exchange coupling between NiO and CoFe layers were promoted and consequently the interface effects were facilitated. The interfacial oxides acted as pinning centers and randomly pinned the FM domains, leading to an increase of coercivity and a considerable degradation of uniaxial anisotropy. The increase of coercivity was also contributed by the enhancement of the interfacial exchange coupling between the NiO and CoFe layers after MFA. As the CoFe thickness increased, the volume effects tended to dominate over the interface effects, resulting in the preservation the uniaxially anisotropic features of CoFe. These results indicate that both the coercivity and anisotropic features of the NiO/CoFe bilayers can be directly affected by the MFA process, opening up the possibility of modifying the magnetism in the NiO/CoFe bilayers and offering an effective way to improve the performance of modern spintronic devices. (C) 2018 The Japan Society of Applied Physics
机译：铁磁性（FM）/反铁磁性（AF）双层结构由于在现代自旋电子器件中的广泛应用而备受关注。尽管已报道了大量有关磁场退火（MFA）过程引起的FM / AF双层界面效应的已发表著作，但很少考虑由MFA处理引起的体积效应。在这项工作中，研究了在不同退火温度下具有不同CoFe厚度的NiO / CoFe双层薄膜的微观结构和磁性。在高退火温度下，促进了NiO和CoFe层之间的层间混合和交换耦合，因此促进了界面效应。界面氧化物充当钉扎中心并随机钉扎FM域，从而导致矫顽力增加和单轴各向异性显着降低。 MFA后，NiO和CoFe层之间的界面交换耦合增强，也有助于矫顽力的提高。随着CoFe厚度的增加，体积效应趋于主导界面效应，从而保留了CoFe的单轴各向异性特征。这些结果表明，MFA工艺可以直接影响NiO / CoFe双层的矫顽性和各向异性，从而为改变NiO / CoFe双层中的磁性开辟了可能性，并提供了一种有效的方法来改善现代的性能。自旋电子器件。 （C）2018日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2018年第1s期|01AC02.1-01AC02.5|共5页
  • 作者

    Zheng Chao; Su Shan; Chiu Chun-Cheng; Skoropata Elizabeth; Desautels Ryan D.; van Lierop Johan; Lin Ko-Wei; Pong Philip W. T.;

  • 作者单位

    Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China;

    Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan;

    Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan;

    Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada;

    Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan;

    Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China;

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