Blowing magnetic skyrmion bubbles
Blowing magnetic skyrmion bubbles
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DOI：
10.1126/science.aaa1442
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发表时间：
2015-07-17
期刊：
影响因子：
56.9
通讯作者：
Hoffmann, Axel
中科院分区：
文献类型：
--
作者：
Jiang, Wanjun;Upadhyaya, Pramey;Hoffmann, Axel
从薄膜形成肥皂泡伴随着拓扑转变。在这里，我们展示了如何磁拓扑结构，一个skyrmion泡，可以在固态系统中以类似的方式产生。利用一个非均匀的面内电流在一个系统与破缺的反演对称性，我们实验“吹”磁skyrmion气泡的几何收缩。空间上发散的自旋-轨道力矩的存在引起磁畴结构的不稳定性，这让人想起流体流动中的瑞利-高原不稳定性。我们确定了Skyrmion形成的相图，并揭示了这些动态创建的Skyrmion，包括脱钉和运动的有效操纵。所展示的电流驱动的从条纹畴到磁性skyrmion气泡的转变可能会导致基于skyrmion的自旋电子学的进展。
The formation of soap bubbles from thin films is accompanied by topological transitions. Here we show how a magnetic topological structure, a skyrmion bubble, can be generated in a solid-state system in a similar manner. Using an inhomogeneous in-plane current in a system with broken inversion symmetry, we experimentally "blow" magnetic skyrmion bubbles from a geometrical constriction. The presence of a spatially divergent spin-orbit torque gives rise to instabilities of the magnetic domain structures that are reminiscent of Rayleigh-Plateau instabilities in fluid flows. We determine a phase diagram for skyrmion formation and reveal the efficient manipulation of these dynamically created skyrmions, including depinning and motion. The demonstrated current-driven transformation from stripe domains to magnetic skyrmion bubbles could lead to progress in skyrmion-based spintronics.