Writing and Deleting Single Magnetic Skyrmions
Writing and Deleting Single Magnetic Skyrmions
复制标题
DOI：
10.1126/science.1240573
复制
发表时间：
2013-08-09
期刊：
影响因子：
56.9
通讯作者：
Wiesendanger, Roland
中科院分区：
文献类型：
--
作者：
Romming, Niklas;Hanneken, Christian;Wiesendanger, Roland
拓扑非平凡的自旋织构最近被调查的自旋电子学应用。在这里，我们报告的一个磁薄膜中，个别skyrmions可以写入和删除在一个控制的方式与当地的自旋极化电流从扫描隧道显微镜。使用外部磁场来调整能量景观，并调整温度以防止拓扑不同状态之间的热激活切换。然后，可以通过用于电流注入的参数来控制切换速率和方向。单个磁skyrmions的产生和湮灭表明了拓扑电荷在未来信息存储概念中的潜力。
Topologically nontrivial spin textures have recently been investigated for spintronic applications. Here, we report on an ultrathin magnetic film in which individual skyrmions can be written and deleted in a controlled fashion with local spin-polarized currents from a scanning tunneling microscope. An external magnetic field is used to tune the energy landscape, and the temperature is adjusted to prevent thermally activated switching between topologically distinct states. Switching rate and direction can then be controlled by the parameters used for current injection. The creation and annihilation of individual magnetic skyrmions demonstrates the potential for topological charge in future information-storage concepts.