Size-tunable skyrmion bubbles in Ta/CoFeB/MgO multilayers
Size-tunable skyrmion bubbles in Ta/CoFeB/MgO multilayers
复制标题
Ta/CoFeB/MgO 多层结构中尺寸可调的斯格明子气泡
DOI:
10.1088/1361-6463/aadd59
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发表时间:
2018-10-24
影响因子:
3.4
通讯作者:
Liu, Qingfang
中科院分区:
文献类型:
--
作者:
Qin, Zhaogang;Jin, Chendong;Liu, Qingfang
The stabilization of skyrmion bubbles in [Ta (t Ta)/CoFeB (1.1 nm)/MgO (1.0 nm)] 15/Ta (2.0 nm) magnetic multilayers with perpendicular magnetic anisotropy is investigated. The size of the skyrmion bubbles can be controlled by tuning the Ta interlayer thickness. Because the perpendicular anisotropy constant is large in samples with a thin Ta interlayer, we can observe nanoscale skyrmion bubbles in our system. This finding provides a means to control the skyrmion size without using an external magnetic field. Moreover, we found that skyrmion bubbles can be created by a magnetic tip and subsequently be deleted. Our novel findings provide insight into skyrmion-based spintronic devices.