论文标题
通过旋转泵研究研究的萘二胺衍生物膜中的自旋传输特性
Spin transport properties in a naphthyl diamine derivative film investigated by the spin pumping
论文作者
论文摘要
我们报告了萘二胺衍生物的薄膜中的自旋转运特性：n，n'-bis（naphthalen-1-基）-n，n'-bis（苯基）-2,2'-二甲基苯胺（alpha-npd）。在钯（PD）/Alpha-NPD/Ni80fe20三层结构样品中，在Alpha-NPD层中产生了纯自旋电流，其旋转泵浦由铁磁共振（FMR）驱动。生成的自旋电流被吸收到PD层中，并将其转换为PD中带有逆旋转效果（ISHE）的电荷电流。在NI80FE20层的FMR下观察到由于PD层中的ISHE引起的电动力，这是Alpha-NPD膜中自旋转运的明确证据。估计在室温下，Alpha-NPD膜中的自旋扩散长度约为62 nm，足够长的时间是用于自旋装置的自旋传输材料。
We report the spin transport properties in a thin film of a naphthyl diamine derivative: N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-2,2'-dimethylbenzidine (alpha-NPD). In a palladium(Pd)/alpha-NPD/Ni80Fe20 tri-layer structure sample, a pure spin current is generated in the alpha-NPD layer with the spin pumping driven by ferromagnetic resonance (FMR). The generated spin current is absorbed into the Pd layer, and converted into a charge current with the inverse spin-Hall effect (ISHE) in Pd. An electromotive force due to the ISHE in the Pd layer is observed under the FMR of the Ni80Fe20 layer, which is clear evidence for the spin transport in an alpha-NPD film. The spin diffusion length in an alpha-NPD film is estimated to be about 62 nm at room temperature, which is long enough as a spin transport material for spintronic devices.
