Size-tunable skyrmion bubbles in Ta/CoFeB/MgO multilayers

Size-tunable skyrmion bubbles in Ta/CoFeB/MgO multilayers
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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
Liu, Qingfang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Qin, Zhaogang;Jin, Chendong;Liu, Qingfang

文献摘要

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研究了具有垂直磁各向异性的[Ta(tTa)/CoFeB(1.1nm)/MgO(1.0nm)] 15/Ta(2.0nm)磁性多层膜中skyrmion气泡的稳定性。通过调节Ta中间层的厚度可以控制Skyrmion气泡的尺寸。由于具有薄Ta夹层的样品的垂直各向异性常数较大,因此我们可以在我们的系统中观察到纳米尺度的skyrmion气泡。这一发现提供了一种在不使用外部磁场的情况下控制skyrmion大小的方法。此外,我们发现,skyrmion气泡可以创建一个磁尖,随后被删除。我们的新发现提供了深入了解skyrmion为基础的自旋电子器件。
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.