High propagating velocity of spin waves and temperature dependent damping in a CoFeB thin film
High propagating velocity of spin waves and temperature dependent damping in a CoFeB thin film
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DOI：
10.1063/1.4731273
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发表时间：
2012-06-25
影响因子：
4
通讯作者：
Grundler, D.
中科院分区：
文献类型：
--
作者：
Yu, Haiming;Huber, R.;Grundler, D.
研究了磁控溅射CoFeB薄膜中自旋波的传播。我们既施加面内磁场，又施加平面外磁场。在室温下，我们测得的速度分别高达25公里/S和3.5公里/S。与薄薄的坡莫合金薄膜相比，这些值要大得多。通过对共振线宽的分析，我们得到了室温下的本征吉尔伯特衰减系数约为0.007。在5K时，它会增加到0.023。CoFeB是一种很有前途的材料，可用于支持快速传播自旋波的磁子器件。(C)2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4731273]
Spin wave propagation in a magnetron-sputtered CoFeB thin film is investigated. We apply both in-plane and out-of-plane magnetic fields. At room temperature, we find velocities of up to 25 and 3.5 km/s, respectively. These values are much larger compared to a thin permalloy film. Analyzing the resonance linewidth, we obtain an intrinsic Gilbert damping parameter of about 0.007 at room temperature. It increases to 0.023 at 5K. CoFeB is a promising material for magnonic devices supporting fast propagating spin waves. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4731273]