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Spin injection, spin diffusion, and spin detection are investigated in Co/Ag/Co lateral spin valves at room temperature.Clear spin accumulation signals are detected by the non-local measurement. By fitting the results to the one-dimensional diffusion equation,~8.6% spin polarization of the Co/Ag interface and ~180 nm spin diffusion length in Ag are obtained.Thermal treatment results show that the spin accumulation signal drastically decreases after 100℃ annealing, and disappears under 200℃ annealing. Our results demonstrate that, compared to the spin diffusion length, the decrease and the disappearance of the spin accumulation signal are mainly dominated by the variation of the interfacial spin polarization of the Co/Ag interface. 相似文献
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以乙酸镉、 2-巯基苯并噻唑、 硫化钠和氯化铜为原料, 依次利用液相热分解与离子吸附法, 改变CdS晶化时间及含量, 制备了4种CdS/CuS纳米复合材料. 研究结果表明: CdS/CuS纳米复合材料呈类球形核壳结构, 改变CdS晶化时间可以控制CdS/CuS纳米复合材料粒径大小; CdS的晶化时间为10 min, CdS与CuS摩尔比为4∶1的纳米复合材料光催化活性最佳, 25 min内对RhB和MB的降解效率均达到99%. 相似文献
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