论文标题
旋转抽水和大型野外扭矩在室温下以溅射的无定形wte $ _ {2-x} $胶片
Spin pumping and large field-like torque at room temperature in sputtered amorphous WTe$_{2-x}$ films
论文作者
论文摘要
我们研究了溅射的WTE2-X（X = 0.8）（T）/CO20FE60B20（6 nm）异质结构的室温下的旋转电荷和旋转转换。旋转泵送测量值用于表征自旋到电荷效率，并且旋转效率大于〜0.035。进行了第二次谐波大厅测量，以估计电荷与旋转转换比。我们发现该系统表现出较大的野外扭矩（自旋扭矩效率〜0.1）和小型阻尼状扭矩（自旋扭矩效率〜0.001），与重金属报告相比。高分辨率透射电子显微镜图像显示，WTE2-X层是无定形的，这可能通过诱导大型界面自旋轨道散射来增强自旋交换效果，从而导致像扭矩这样的大磁场。
We studied the spin-to-charge and charge-to-spin conversion at room temperature in sputtered WTe2-x (x=0.8)(t)/Co20Fe60B20(6 nm) heterostructures. Spin pumping measurements were used to characterize the spin-to-charge efficiency and the spin efficiency was calculated to be larger than ~0.035. Second harmonic Hall measurements were carried out to estimate the charge-to-spin conversion ratio. We found that the system exhibits a large field-like-torque (spin torque efficiency ~ 0.1) and small damping-like-torque (spin torque efficiency ~0.001) compared to that reported for heavy metals. High-resolution transmission electron microscopy images show that the WTe2-x layer is amorphous, which may enhance the spin swapping effect by inducing large interfacial spin orbit scattering, thus contributing to a large field like torque.
