Effect of nanoparticle size on magnetic damping parameter in Co92Zr8 soft magnetic films |
| |
Authors: | Gaoxue Wang Chunhui DongChangjun Jiang Guozhi ChaiDesheng Xue |
| |
Affiliation: | Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, People''s Republic of China |
| |
Abstract: | Co92Zr8(50 nm)/Ag(x) soft magnetic films have been prepared on Si (111) substrates by oblique sputtering at 45°. Nanoparticle size of Co92Zr8 soft magnetic films can be tuned by thickening Ag buffer layer from 9 nm to 96 nm. The static and dynamic magnetic properties show great dependence on Ag buffer layer thickness. The coercivity and effective damping parameter of Co92Zr8 films increase with thickening Ag buffer layer. The intrinsic and extrinsic parts of damping were extracted from the effective damping parameter. For x=96 nm film, the extrinsic damping parameter is 0.028, which is significantly larger than 0.004 for x=9 nm film. The origin of the enhancement of extrinsic damping can be explained by increased inhomogeneity of anisotropy. Therefore, it is an effective method to tailor magnetic damping parameter of thin magnetic films, which is desirable for high frequency application. |
| |
Keywords: | Soft magnetic film Magnetic damping parameter Nanoparticle size Sputtering |
本文献已被 ScienceDirect 等数据库收录! |