| 厚度对Ni_(25)Fe_(75)-ZnO颗粒膜阻尼因子和软磁特性的影响 |
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| 引用本文： | 周雪云,周利玲,刘晓红,候翠岭,程融,姚东升.厚度对Ni_(25)Fe_(75)-ZnO颗粒膜阻尼因子和软磁特性的影响[J].磁性材料及器件,2016(5). |
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| 作者姓名： | 周雪云 周利玲 刘晓红 候翠岭 程融 姚东升 |
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| 作者单位： | 1. 九江学院 固体微结构江西省重点实验室,江西九江,332005;2. 天津大学低维材料物理和先进材料制备技术天津市重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金资助项目(50901050；51101079；11164011) |
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| 摘 要： | 采用磁控溅射制备了(Ni_(25)Fe_(75))-ZnO颗粒膜,研究了其高频动态磁性与薄膜厚度的关系,用Landau-Lifshitz-Gilbert方程计算出阻尼因子,并用一个幂函数拟合与外场的关系曲线。实验结果和拟合结果表明,动态磁化时有效阻尼系数αeff和内禀阻尼系数αint均随着样品厚度减小而增大。αint和αeff变化的物理起源应该与微结构的不均匀性、薄膜与衬底之间的界面效应和薄膜中的混杂物有关。
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| 关 键 词： | (Ni25Fe75)-ZnO颗粒膜 高频特性 薄膜厚度 阻尼 软磁特性 |
The influence of film thickness on damping factor and soft magnetic properties of Ni25Fe75-ZnO granular films |
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| ZHOU Xue-yun,ZHOU Li-ling,LIU Xiao-hong,HOU Cui-ling,CHEN Rong,YAO Dong-sheng.The influence of film thickness on damping factor and soft magnetic properties of Ni25Fe75-ZnO granular films[J].Journal of Magnetic Materials and Devices,2016(5). |
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| Authors: | ZHOU Xue-yun ZHOU Li-ling LIU Xiao-hong HOU Cui-ling CHEN Rong YAO Dong-sheng |
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| Abstract: | (Ni25Fe75)ZnO granular films with various thicknesses were deposited by magnetron co-sputtering method. The effective damping factor was calculated by Landau-Lifshitz-Gilbert equation. The dependence of the effective damping factor on the external fields was fitted with a power function. The measurement and fitting results show that both the effective and the intrinsic damping coefficients in the magnetization dynamics gradually increase with the decrease of the film thicknesst. It suggested that the physical origins of the variation forαnt andαef should be related to the microstructure inhomogeneity, the interface effect between the film and the substrate and the impurity in the films. |
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| Keywords: | magnetic granular thin films high frequency properties film thickness damping soft magnetic properties |
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