Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interactions in stabilizing compact magnetic skyrmions
Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interactions in stabilizing compact magnetic skyrmions
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DOI：
10.1103/physrevb.101.045416
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发表时间：
2020-01-14
影响因子：
3.7
通讯作者：
Simon, Thilo M.
中科院分区：
文献类型：
--
作者：
Bernand-Mantel, Anne;Muratov, Cyrill B.;Simon, Thilo M.
我们提出了一个理论研究的紧凑的磁性skyrmions在铁磁薄膜的垂直磁各向异性，占全部杂散场的能量在薄膜和低界面Dzyaloshinskiiii-Moriya相互作用（ZH）制度。在这个制度下，skyrmion的档案是接近Belavin-Polyakov档案，从而产生平衡skyrmion半径和能量的解析表达式。所得到的公式提供了一个明确的识别，作为两个物理机制，确定skyrmion的大小和稳定性的双极和长程偶极相互作用。
We present a theoretical study of compact magnetic skyrmions in ferromagnetic films with perpendicular magnetic anisotropy that accounts for the full stray field energy in the thin film and low interfacial Dzyaloshinskii-Moriya interaction (DMI) regime. In this regime, the skyrmion profile is close to a Belavin-Polyakov profile, which yields analytical expressions for the equilibrium skyrmion radius and energy. The obtained formulas provide a clear identification of DMI and long-range dipolar interaction as two physical mechanisms determining skyrmion size and stability.