论文标题
元素解析了超级灭绝的超级terahertz旋转电流的证据
Element resolved evidence of superdiffusive terahertz spin current arising from ultrafast demagnetization process
论文作者
论文摘要
使用RU/Fe $ _ {65} $ CO $ $ _ {35} $异构结构的超快消灭的元素特定测量值，我们表明RU可以表现出来自超级旋转的磁对比度（3％不对称），这是由于超出旋转的频率来自于feco层的磁化过程中发出的超快旋转电流。我们使用这种磁对比度来研究超级旋转电流如何受FECO层中重元素的掺杂影响。我们发现自旋电流被强烈抑制，并且Ru中的恢复过程通过重新掺杂而减慢。这是根据超级旋转传输模型发现的自旋电流的界面反射率的变化。
Using element-specific measurements of the ultrafast demagnetization of Ru/Fe$_{65}$Co$_{35}$ heterostructures, we show that Ru can exhibit a significant magnetic contrast (3% asymmetry) resulting from ultrafast spin currents emanating from the demagnetization process of the FeCo layer. We use this magnetic contrast to investigate how superdiffusive spin currents are affected by the doping of heavy elements in the FeCo layer. We find that the spin currents are strongly suppressed, and that the recovery process in Ru slows down, by Re doping. This is in accordance with a change in interface reflectivity of spin currents as found by the superdiffusive spin transport model.
