Effect of nanoparticle size on magnetic damping parameter in Co₉₂Zr₈ soft magnetic films

详细信息	查看全文 | 推荐本文 |

• 作者：Gaoxue Wang ; Chunhui Dong ; Changjun Jiang ; ^{jiangchj@lzu.edu.cn} ; Guozhi Chai ; Desheng Xue
• 关键词：Soft magnetic film ; Magnetic damping parameter ; Nanoparticle size ; Sputtering
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：September, 2012
• 卷：324
• 期：18
• 页码：2840-2843
• 文件大小：665 K

摘要

Co₉₂Zr₈(50 nm)/Ag(x) soft magnetic films have been prepared on Si (111) substrates by oblique sputtering at 45掳. 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.