Formation and magnetic-field stability of magnetic dipole skyrmions and bubbles in a ferrimagnet
Formation and magnetic-field stability of magnetic dipole skyrmions and bubbles in a ferrimagnet
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DOI：
10.1063/1.5142562
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发表时间：
2020-04
影响因子：
4
通讯作者：
Junwei Zhang;Xiaomin Zhang;Huanjian Chen;Y. Guang;Xue Zeng;Guoqiang Yu;Senfu Zhang;Yizhou Liu-Yizho
中科院分区：
文献类型：
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作者：
Junwei Zhang;Xiaomin Zhang;Huanjian Chen;Y. Guang;Xue Zeng;Guoqiang Yu;Senfu Zhang;Yizhou Liu-Yizho
我们使用洛伦兹透射电子显微镜研究了铁磁CoTb薄膜中的磁畴图案。在不同的温度和外场条件下，记录了畴结构的演化。通过提高样品的温度和施加适当的面外磁场，可以同时产生磁偶极子skyrmions和气泡。通过调节外部磁场，发现与气泡相比，skyrmion在更高的磁场下被湮灭。此外，我们还发现，面内磁场影响skyrmions和气泡的形成和形状。此外，微磁学模拟也与实验观察一致。我们的研究结果提供了深入了解skyrmions的磁场稳定性。
We study the magnetic domain pattern in a ferrimagnetic CoTb thin film using Lorentz transmission electron microscopy. The evolution of domain patterns is captured at different temperatures and external fields. Magnetic dipole skyrmions and bubbles can be created simultaneously by increasing the temperature of the sample and applying appropriate out-of-plane magnetic fields. By tuning the external magnetic fields, it is found that the skyrmions are annihilated at a higher magnetic field compared to bubbles. Moreover, we also find that the in-plane magnetic field influences the formation and the shape of skyrmions and bubbles. Further, micromagnetic simulations are also consistent with the experimental observations. Our findings provide insights into the magnetic field stability of skyrmions.