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Propagation properties of spin wave in Co2FeAl Heusler alloy ultrathin films
Materials Research Express ( IF 2.3 ) Pub Date : 2021-08-25 , DOI: 10.1088/2053-1591/ac1d66
Suraj Singh 1 , Nanhe Kumar Gupta 2 , Soumyarup Hait 2 , Sujeet Chaudhary 2 , Thomas Tybell 3 , Erik Wahlstrm 1
Affiliation  

We report an investigation of spin wave propagation in ion beam sputtered Co2FeAl Heusler alloy thin film on Si(100) substrate. The spin wave transmission spectra measured at fixed frequencies by sweeping the external applied magnetic field were used to estimate technologically relevant spin wave propagation parameters. The spin wave group velocity was found at 6.1 km s−1 with an attenuation length larger than 7 μm. The Gilbert damping parameter was estimated to be 0.019. The frequency dependency of the group velocity decreased with increasing frequency and the attenuation length increased at low frequencies while started to decrease at larger frequencies. The amplitude of non-reciprocity also decreased with increasing frequency. The propagation parameters presented were also independently verified by time-resolved propagating spin wave spectroscopy.



中文翻译:

自旋波在 Co2FeAl Heusler 合金超薄膜中的传播特性

我们报告了对 Si(100) 衬底上离子束溅射 Co 2 FeAl Heusler 合金薄膜中自旋波传播的研究。通过扫描外部施加的磁场在固定频率下测量的自旋波传输光谱用于估计技术相关的自旋波传播参数。在 6.1 km s -1处发现自旋波群速度,衰减长度大于 7 μ米。吉尔伯特阻尼参数估计为 0.019。群速度的频率依赖性随着频率的增加而减小,并且衰减长度在低频处增加而在较大频率处开始减小。非互易的幅度也随着频率的增加而减小。所呈现的传播参数也通过时间分辨传播自旋波谱独立验证。

更新日期:2021-08-25
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