Orbital angular momentum and current-induced motion of a Skyrmion-textured domain wall in a ferromagnetic nanotube

反铁磁体中斯格明子纹理畴壁内的磁振子动力学

Magnon dynamics in a Skyrmion-textured domain wall of antiferromagnets

本文利用超对称量子力学精确求解二维反铁磁体斯格明子纹理畴壁上的磁振子散射问题，揭示手性增强会抑制热输运，并提出可通过斯格明子电荷密度调控自旋卡诺电子器件。

Current-induced skyrmion motion on magnetic nanotubes

Magnetic skyrmions are believed to be the promising candidate of information carriers in spintronics. However, the skyrmion Hall effect due to the nontrivial topology of skyrmions can induce a skyrmion accumulation or even annihilation at the edge of the devices, which hinders the real-world applications of skyrmions. In this work, we theoretically investigate the current-driven skyrmion motion on magnetic nanotubes which can be regarded as "edgeless" in the tangential direction. By performing micromagnetic simulations, we find that the skyrmion motion exhibits a helical trajectory on the nano…

Stray field signatures of Néel textured skyrmions in Ir/Fe/Co/Pt multilayer films

Skyrmions are nanoscale spin configurations with topological properties that hold great promise for spintronic devices. Here, we establish their Néel texture, helicity, and size in Ir/Fe/Co/Pt multilayer films by constructing a multipole expansion to model their stray field signatures and applying it to magnetic force microscopy (MFM) images. Furthermore, the demonstrated sensitivity to inhomogeneity in skyrmion properties, coupled with a unique capability to estimate the pinning force governing dynamics, portends broad applicability in the burgeoning field of topological spin textures.

Magnetic skyrmions in cylindrical ferromagnetic nanostructures with chiral interactions

We study the geometrical conditions for stabilizing magnetic skyrmions in cylindrical nanostrips and nanotubes of ferromagnetic materials with chiral interactions. We obtain the low-temperature equilibrium state of the system implementing a simulation annealing technique for a classical spin Hamiltonian with competing isotropic exchange and chiral interactions, radial anisotropy and an external field. We address the impact of surface curvature on the formation, the shape and the size of magnetic skyrmions. We demonstrate that the evolution of the skyrmion phase with the curvature is controlled…

具有磁织构的交变磁体中的自旋转移力矩

Spin-Transfer Torque in Altermagnets with Magnetic Textures

本研究预测了具有磁织构的交变磁体中存在各向异性自旋转移力矩效应，通过推广Zhang-Li力矩并分析自旋劈裂绝热与非绝热力矩，发现该力矩能显著影响畴壁运动及skyrmion动力学，可作为区分交变磁性与普通反铁磁性的标志。

磁隧道结上的斯格明子：量子输运与微磁学的交织

Skyrmion on magnetic tunnel junction: weaving quantum transport with micro-magnetism

本研究基于非平衡格林函数描述磁隧道结上的斯格明子，预测了纹理自旋电流与不对称自旋力矩，揭示了尺寸缩放对TMR及电流的影响，并提出高效的耦合空间-本征NEGF计算框架。