Influence of film composition on the structure, magnetic properties and Gilbert damping constant in epitaxial Co2(1+x)Mn1−xSi1−x Heusler alloys
Influence of film composition on the structure, magnetic properties and Gilbert damping constant in epitaxial Co2(1+x)Mn1−xSi1−x Heusler alloys
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DOI：
10.1088/0022-3727/46/19/195001
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
Fujun Yang;Xiang-peng Kong;Xiaoqin Chen
中科院分区：
文献类型：
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作者：
Fujun Yang;Xiang-peng Kong;Xiaoqin Chen
制备了Co2(1+x)Mn1−xSi1−x(x=0.0~0.4)薄膜，研究了薄膜的吉尔伯特衰减常数与Co浓度的关系。研究了结构和磁性能的变化，分析了影响阻尼常数的因素。由于具有良好的薄膜质量和良好的B2有序性，Co2MnSi(x=0.0054)薄膜具有较小的阻尼常数(α=0.0054)和较大的饱和磁化强度(ms=864emu cm−3)。Co反位的形成导致了矫直力和阻尼常数的增加。Co2.6Mn0.7Si0.7(x=0.3)薄膜的阻尼常数突变归因于半金属性的消失。
Co2(1+x)Mn1−xSi1−x (x = 0.0–0.4) films are prepared to investigate the dependence of Gilbert damping constant on Co concentration. The evolution of structure and magnetic properties is also studied to analyse the influencing factors of damping constant. Due to the perfect film quality and good B2 ordering, the Co2MnSi (x = 0.0) film shows a small damping constant (α = 0.0054) and large saturation magnetization (Ms = 864 emu cm−3). The formation of Co antisites induces an increase in coercivity and damping constant. The abrupt jump of damping constant in the Co2.6Mn0.7Si0.7(x = 0.3) films is attributed to the disappearance of half-metallicity.