论文标题
与钒和铝的外延FE中的磁阻尼
Magnetic Damping in Epitaxial Fe Alloyed with Vanadium and Aluminum
论文作者
论文摘要
为了开发低音，低阻尼的金属铁磁磁铁，用于发电的自旋装置，重要的是要了解磁性松弛如何受到非磁性元件的影响。在这里，我们比较了与V和Al的光非磁元素合成的外延FE膜中的磁松弛。与纯Fe相比，FEV合金表现出较低的固有阻尼，近2倍降低2倍，而菲尔合金的阻尼随着Al含量而增加。我们的实验和计算结果表明，在费米水平上降低状态的密度，而不是平均原子数，在降低具有光元素的Fe降低阻尼方面具有更大的影响。此外，FEV已被证实显示出$ \ simeq $ 0.001的固有性吉尔伯特阻尼参数，这是铁磁金属有史以来最低的。
To develop low-moment, low-damping metallic ferromagnets for power-efficient spintronic devices, it is crucial to understand how magnetic relaxation is impacted by the addition of nonmagnetic elements. Here, we compare magnetic relaxation in epitaxial Fe films alloyed with light nonmagnetic elements of V and Al. FeV alloys exhibit lower intrinsic damping compared to pure Fe, reduced by nearly a factor of 2, whereas damping in FeAl alloys increases with Al content. Our experimental and computational results indicate that reducing the density of states at the Fermi level, rather than the average atomic number, has a more significant impact in lowering damping in Fe alloyed with light elements. Moreover, FeV is confirmed to exhibit an intrinsic Gilbert damping parameter of $\simeq$0.001, among the lowest ever reported for ferromagnetic metals.
