Dynamic magnetic characteristics of obliquely sputtered Co2FeSi film with ultrahigh in-plane uniaxial anisotropy
Dynamic magnetic characteristics of obliquely sputtered Co2FeSi film with ultrahigh in-plane uniaxial anisotropy
复制标题
DOI：
10.1088/2053-1591/3/11/116103
复制
发表时间：
2016-11
影响因子：
2.3
通讯作者：
Zhan Xu;Zhi Zhang;F. Hu;E. Liu;Feng Xu
中科院分区：
文献类型：
--
作者：
Zhan Xu;Zhi Zhang;F. Hu;E. Liu;Feng Xu
我们系统地研究了斜沉积Co2FeSi薄膜的静磁和动磁特性。通过改变Co2FeSi薄膜的倾斜沉积角度，在倾斜角度为39°时产生了较大的面内单轴磁各向异性，最大磁场为626.7 Oe，其零场铁磁共振（FMR）频率显著提高，最高可达10.8 GHz。分别从均匀FMR模式和第一垂直驻旋波中测定了Co2FeSi薄膜的Gilbert阻尼系数和交换刚度等磁动力参数。通过改变斜沉积角，Gilbert阻尼系数可以很容易地从0.006调整到0.013，而交换刚度几乎保持不变。这些具有可调磁性能的Co2FeSi薄膜可能是传统和自旋电子学微波器件的良好候选材料。
We performed systematically studies on the magnetostatic and magnetodynamic properties of obliquely deposited Co2FeSi thin films. By varying the oblique deposition angle of Co2FeSi films, we induced a large in-plane uniaxial magnetic anisotropy field with the maximum value of 626.7 Oe at oblique angle of 39°, which significantly enhanced its zero-field ferromagnetic resonance (FMR) frequency up to 10.8 GHz. The magnetodynamic parameters such as Gilbert damping factor and exchange stiffness of Co2FeSi films were determined from the uniform FMR mode and the first perpendicular standing spin-wave, respectively. It is found that the Gilbert damping factor can be easily tuned from 0.006 to 0.013 by changing oblique deposition angle, whereas the exchange stiffness stays almost constant. These Co2FeSi films with tunable magnetic properties might be a good candidate for applications in both conventional and spintronics microwave devices.