| Improvement of high-frequency properties of Co2FeSi Heusler films by ultrathin Ru underlayer |
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| 作者姓名： | 王翠玲 张守珩 李山东 杜洪磊 赵国霞 曹德让 |
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| 作者单位： | College of Physics;College of Electronic and Information Engineering;School of Physics |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.11674187 and 51871127);the Fund from the Technology on Electronic Test&Measurement Laboratory(Grant No.6142001180103)。 |
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| 摘 要： | Heusler Co2FeSi films with a uniaxial magnetic anisotropy and high ferromagnetic resonance frequency fr were deposited by an oblique sputtering technique on Ru underlayers with various thicknesses tRufrom 0 nm to 5 nm.It is revealed that the Ru underlayers reduce the grain size of Co2FeSi,dramatically enhance the magnetic anisotropy field HK induced by the internal stress from 242 Oe(1 Oe=79.5775 A·m^-1)to 582 Oe with an increment ratio of 2.4,while a low damping coefficient remains.The result of damping implies that the continuous interface between Ru and Co2FeSi induces a large in-plane anisotropic field without introducing additional external damping.As a result,excellent high-frequency soft magnetic properties with fr up to 6.69 GHz are achieved.
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| 关 键 词： | OBLIQUE sputtering FERROMAGNETIC resonance RU UNDERLAYER HEUSLER thin film |
Improvement of high-frequency properties of Co_2FeSi Heusler films by ultrathin Ru underlayer |
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| Cuiling Wang,Shouheng Zhang,Shandong Li,Honglei Du,Guoxia Zhao,Derang Cao.Improvement of high-frequency properties of Co2FeSi Heusler films by ultrathin Ru underlayer[J].Chinese Physics B,2020(4):379-384. |
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| Authors: | Cuiling Wang Shouheng Zhang Shandong Li Honglei Du Guoxia Zhao Derang Cao |
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| Institution: | (College of Physics,Center for Marine Observation and Communication,Qingdao University,Qingdao 266071,China;College of Electronic and Information Engineering,Shandong University of Science and Technology,Qingdao 266510,China;School of Physics,Shandong University,Jinan 250100,China) |
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