AI 中文总结
研究超薄铁磁体中磁泡畴不对称扩展以探测 DMI，开发扩展角度蠕变模型，结合色散畴壁刚度和手性依赖前置因子，捕捉畴壁运动全各向异性动力学，完善蠕变驱动畴扩展框架并提高 DMI 等效应提取灵敏度。
AI 中文摘要
超薄铁磁体中磁泡畴的不对称扩展为探测界面 Dzyaloshinskii-Moriya 相互作用（DMI）提供了有力途径。传统分析依赖沿选定方向测量的畴壁速度作为面内场的函数，而最近的方法强调了速度 v(θ)的角度依赖性中包含的额外见解。在此，我们开发了一个扩展的角度蠕变模型，该模型结合了色散畴壁刚度和与手性阻尼相关的手性依赖前置因子。这种推广捕捉了围绕泡畴的畴壁运动的全各向异性动力学。我们表明，这些贡献显著改变了角速度分布，并可导致现有模型中无法获得的特征。我们的结果为解释蠕变驱动的畴扩展建立了一个更完整的框架，并为定量提取 DMI 和手性动力学效应提供了更高的灵敏度。
英文摘要
The asymmetric expansion of magnetic bubble domains in ultrathin ferromagnets provides a powerful route to probe the interfacial Dzyaloshinskii-Moriya interaction (DMI). While conventional analyses rely on domain wall velocities measured along selected directions as a function of in-plane field, recent approaches have highlighted the additional insight contained in the angular dependence of the velocity, $v(θ)$. Here, we develop an extended angular creep model that incorporates both the dispersive domain wall stiffness and a chirality-dependent prefactor associated with chiral damping. This generalization captures the full anisotropic dynamics of domain wall motion around a bubble domain. We show that these contributions significantly modify the angular velocity profile and can lead to features not accessible within existing models. Our results establish a more complete framework for interpreting creep-driven domain expansion and provide improved sensitivity for the quantitative extraction of DMI and chiral dynamical effects.
Comments17 Pages, 6 Figures
