中国物理B ›› 2023, Vol. 32 ›› Issue (12): 127503-127503.doi: 10.1088/1674-1056/acd523

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Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Tianyong Ma(马天勇)1, Sha Zhang(张莎)1, Chenhu Zhang(张晨虎)2, Zhiwei Li(李志伟)2, Tao Wang(王涛)2,†, and Fashen Li(李发伸)2   

  1. 1 The Key Laboratory of Physics and Photoelectric Information Functional Materials, North Minzu University, Yinchuan 750021, China;
    2 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2022-12-05 修回日期:2023-04-28 接受日期:2023-05-12 出版日期:2023-11-14 发布日期:2023-11-22
  • 通讯作者: Tao Wang E-mail:wtao@lzu.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Ningxia in China (Grant No.2022AAC03288) and the Ningxia New Solid Electronic Materials and Devices Research and Development Innovation Team (Grant No.2020CXTDLX12).

Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Tianyong Ma(马天勇)1, Sha Zhang(张莎)1, Chenhu Zhang(张晨虎)2, Zhiwei Li(李志伟)2, Tao Wang(王涛)2,†, and Fashen Li(李发伸)2   

  1. 1 The Key Laboratory of Physics and Photoelectric Information Functional Materials, North Minzu University, Yinchuan 750021, China;
    2 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2022-12-05 Revised:2023-04-28 Accepted:2023-05-12 Online:2023-11-14 Published:2023-11-22
  • Contact: Tao Wang E-mail:wtao@lzu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Ningxia in China (Grant No.2022AAC03288) and the Ningxia New Solid Electronic Materials and Devices Research and Development Innovation Team (Grant No.2020CXTDLX12).

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摘要： The c-axis oriented hcp-Co81Ir19 magnetic films were prepared on different seed layers (Ni, Cu, Ir, Pt, Au, and No seed). We systematically investigated the impact that surface-free energy and strain energy have on the orientation and defects and/or internal stress of the grains by increasing the lattice mismatch ratio. Moreover, the initial permeability and the natural resonance frequency were discussed in great detail using a comparison between calculated values and experimental values. We found that the almost unchanged 4πMs and μi are not affected, while the changed Hc, intrinsic Kgrain, and fr are strongly dependent on the seed layer and seed layer material. Moreover, the extracted damping constant is sensitive to the defects and/or internal stress and orientation of the grains. Therefore, the soft magnetic properties and microwave properties are adjusted and optimized by seed layers with different materials.

关键词: seed layers, magnetic anisotropy, surface free energy, soft magnetic thin films

Abstract: The c-axis oriented hcp-Co81Ir19 magnetic films were prepared on different seed layers (Ni, Cu, Ir, Pt, Au, and No seed). We systematically investigated the impact that surface-free energy and strain energy have on the orientation and defects and/or internal stress of the grains by increasing the lattice mismatch ratio. Moreover, the initial permeability and the natural resonance frequency were discussed in great detail using a comparison between calculated values and experimental values. We found that the almost unchanged 4πMs and μi are not affected, while the changed Hc, intrinsic Kgrain, and fr are strongly dependent on the seed layer and seed layer material. Moreover, the extracted damping constant is sensitive to the defects and/or internal stress and orientation of the grains. Therefore, the soft magnetic properties and microwave properties are adjusted and optimized by seed layers with different materials.

Key words: seed layers, magnetic anisotropy, surface free energy, soft magnetic thin films

中图分类号:  (Epitaxial and superlattice films)

  • 77.55.Px
75.30.Gw (Magnetic anisotropy) 34.20.-b (Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)