We investigate the magnetic damping parameter of Fe 1 – x Cr x thin films using the time-resolved magneto-optical Kerr effect technique. It is demonstrated that the overall effective damping parameter is enhanced with the increasing Cr concentration. The effective damping at high field α 0 is found to be significantly enhanced when increasing the Cr concentration with the α 0 = 0.159 in the Fe 45 Cr 55 enhanced by 562% compared with that of α 0 = 0.024 in the pure Fe film. This study provides a new approach of controlling the effective damping parameter with a desired magnitude via varying Cr composition.

中文翻译：

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通过改变Fe 1–x Cr x合金中的Cr组成来调节磁阻尼参数

我们使用时间分辨磁光克尔效应技术研究了Fe 1 – x Cr x薄膜的磁阻尼参数。结果表明，总有效阻尼参数随Cr浓度的增加而提高。发现当增加Cr浓度时，与纯Fe膜中的α0 = 0.024相比，当Fe 45 Cr 55中的α0 = 0.159增强了562％时，在高场α0处的有效阻尼显着增强。这项研究提供了一种新的方法，通过改变Cr的成分，将有效阻尼参数控制在所需的大小。