We study spin transport through a suspended Cu channel by an electrical non-local 4-terminal measurement for future spin mechanics applications. A magnetoresistance due to spin transport through the suspended Cu channel is observed, and its magnitude is comparable to that of a conventional fixed Cu lateral spin valve. The spin diffusion length in the suspended Cu channel is estimated to be 340 nm at room temperature from the spin signal dependence on the distance between the ferromagnetic injector and detector electrodes. This value is found to be slightly shorter than in a fixed Cu. The decrease in the spin diffusion length in the suspended Cu channel is attributed to an increase in spin scattering originating from naturally oxidized Cu at the bottom of the Cu channel.

我们通过电非局部4端子测量研究通过悬浮Cu通道的自旋输运，以用于未来的自旋力学应用。观察到由于自旋穿过悬浮的铜通道而产生的磁阻，其大小可与传统的固定式铜侧向自旋阀相媲美。根据自旋信号，取决于铁磁注入器和检测器电极之间的距离，在室温下，悬浮Cu通道中的自旋扩散长度估计为340 nm。发现该值比固定Cu中的值稍短。悬浮的铜通道中的自旋扩散长度的减小归因于自旋散射的增加，该自旋散射源自于铜通道底部的自然氧化的铜。