Three-dimensional structure of hybrid magnetic skyrmions determined by neutron scattering
Three-dimensional structure of hybrid magnetic skyrmions determined by neutron scattering
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DOI：
10.1103/physrevb.107.184412
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发表时间：
2023-04
影响因子：
3.7
通讯作者：
W. Liyanage;N. Tang;Lizabeth Quigley;J. Borchers;A. Grutter;B. Maranville;S. Sinha;N. Reyren;S. Montoya;E. Fullerton;L. Debeer-Schmitt;D. Gilbert
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文献类型：
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作者：
W. Liyanage;N. Tang;Lizabeth Quigley;J. Borchers;A. Grutter;B. Maranville;S. Sinha;N. Reyren;S. Montoya;E. Fullerton;L. Debeer-Schmitt;D. Gilbert
磁skyrmions是拓扑保护的手征自旋纹理，它为下一代磁数据存储和逻辑信息技术提供了机会。这些结构的拓扑起源于磁自旋的几何构型-更一般地描述为结构。虽然skyrmion结构最常使用三维结构的2D投影来描绘，但最近的作品强调了所有三个维度在确定拓扑结构及其对外部刺激的反应中的作用。在这项工作中，掠入射小角中子散射和极化中子反射计被用来确定混合skyrmions的三维结构。混合skyrmions的结构，其中包括N 'eel样和布洛赫样组件的组合沿着其长度，预计将显着有助于其显着的稳定性，其中包括环境条件。为了解释中子散射数据，进行了混合Skyrmions的微磁模拟，并使用玻恩近似变换确定相应的衍射图案。会聚的磁剖面揭示了磁结构沿着与skyrmion深度剖面，包括厚度的布洛赫和N 'eel段和核心的直径。
Magnetic skyrmions are topologically protected chiral spin textures which present opportunities for next-generation magnetic data storage and logic information technologies. The topology of these structures originates in the geometric configuration of the magnetic spins - more generally described as the structure. While the skyrmion structure is most often depicted using a 2D projection of the three-dimensional structure, recent works have emphasized the role of all three dimensions in determining the topology and their response to external stimuli. In this work, grazing-incidence small-angle neutron scattering and polarized neutron reflectometry are used to determine the three-dimensional structure of hybrid skyrmions. The structure of the hybrid skyrmions, which includes a combination of N\'eel-like and Bloch-like components along their length, is expected to significantly contribute to their notable stability, which includes ambient conditions. To interpret the neutron scattering data, micromagnetic simulations of the hybrid skyrmions were performed, and the corresponding diffraction patterns were determined using a Born approximation transformation. The converged magnetic profile reveals the magnetic structure along with the skyrmion depth profile, including the thickness of the Bloch and N\'eel segments and the diameter of the core.