标题： IrMn中与反铁磁序无关的自旋退相干 显示英文标题

标题： Spin decoherence independent of antiferromagnetic order in IrMn

摘要： 我们研究了固定反铁磁序对多晶IrMn中自旋电流退相干的影响。 在NiFe/Cu/IrMn/CoFe多层结构中，我们从NiFe中相干地泵浦电子自旋电流进入IrMn，其反铁磁序通过与CoFe的静态交换偏置耦合被全局固定。 我们观察到自旋退相干相对于固定反铁磁序的方向没有各向异性。 我们还观察到具有和不具有固定反铁磁序的样品在自旋退相干方面没有差异。 此外，尽管在IrMn/CoFe切换时NiFe中出现了明显的共振线宽增加，但我们证明这并不表示IrMn中的各向异性自旋退相干。 我们的结果表明，电子介导的自旋电流的退相干对反铁磁IrMn自旋阱的磁化状态非常不敏感。 显示英文摘要

摘要： We investigate the impact of pinned antiferromagnetic order on the decoherence of spin current in polycrystalline IrMn. In NiFe/Cu/IrMn/CoFe multilayers, we coherently pump an electronic spin current from NiFe into IrMn, whose antiferromagnetic order is globally pinned by static exchange-bias coupling with CoFe. We observe no anisotropic spin decoherence with respect to the orientation of the pinned antiferromagnetic order. We also observe no difference in spin decoherence for samples with and without pinned antiferromagnetic order. Moreover, although there is a pronounced resonance linewidth increase in NiFe that coincides with the switching of IrMn/CoFe, we show that this is not indicative of anisotropic spin decoherence in IrMn. Our results demonstrate that the decoherence of electron-mediated spin current is remarkably insensitive to the magnetization state of the antiferromagnetic IrMn spin sink.