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

作　　者：马天勇 张莎 张晨虎 李志伟 王涛 李发伸 Tianyong Ma;Sha Zhang;Chenhu Zhang;Zhiwei Li;Tao Wang;Fashen Li(The Key Laboratory of Physics and Photoelectric Information Functional Materials,North Minzu University,Yinchuan 750021,China;Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000,China)

机构地区：[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

出　　处：《Chinese Physics B》2023年第12期554-559,共6页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Ningxia in China (Grant No.2022AAC03288);the Ningxia New Solid Electronic Materials and Devices Research and Development Innovation Team (Grant No.2020CXTDLX12)。

摘　　要：The c-axis oriented hcp-Co_(81)Ir_(19)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 4πM_(s) andμ_(i) are not affected,while the changed H_(c),intrinsic K_(grain),and f_(r) 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 

分 类 号：TM271.2[一般工业技术—材料科学与工程] TB383.2[电气工程—电工理论与新技术]