Information Transfer by Vector Spin Chirality in Finite Magnetic Chains
Information Transfer by Vector Spin Chirality in Finite Magnetic Chains
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DOI：
10.1103/physrevlett.108.197204
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发表时间：
2012-05-07
影响因子：
8.6
通讯作者：
Wiesendanger, Roland
中科院分区：
文献类型：
--
作者：
Menzel, Matthias;Mokrousov, Yuriy;Wiesendanger, Roland
矢量自旋手性是复杂磁体的基本特性之一。对于一维自旋螺旋态，它可以解释为旋向性，或螺旋的旋转意义。在这里，使用自旋极化扫描隧道显微镜，我们证明了在（5 x 1）类似于Ir（001）表面的有限单个双原子铁链中原子尺度自旋螺旋的发生。我们发现，表面的逆对称破坏促进了矢量自旋手性的一个方向，导致所有链中的螺旋具有独特的旋转感。相应的，一个链端自旋方向的变化可以在几十纳米之外被探测到，这为在纳米尺度上传输磁性物体状态信息提供了一种新的方法。
Vector spin chirality is one of the fundamental characteristics of complex magnets. For a one-dimensional spin-spiral state it can be interpreted as the handedness, or rotational sense of the spiral. Here, using spin-polarized scanning tunneling microscopy, we demonstrate the occurrence of an atomic-scale spin spiral in finite individual bi-atomic Fe chains on the (5 x 1) similar to Ir(001) surface. We show that the broken inversion symmetry at the surface promotes one direction of the vector spin chirality, leading to a unique rotational sense of the spiral in all chains. Correspondingly, changes in the spin direction of one chain end can be probed tens of nanometers away, suggesting a new way of transmitting information about the state of magnetic objects on the nanoscale.