论文标题
对沿铁磁条的域壁动力学的最新实验的新解释
Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips
论文作者
论文摘要
使用微磁模拟和集体坐标模型评估沿铁磁体的结构壁运动，均考虑了两个具有独立参数的sublattices。分析表达式是针对重金属或具有可忽略的界面dzyaloshinskii-moriya相互作用的底物的条带的分析表达式。这项工作将其发现重点在后一种情况下，野外驱动的域壁运动描绘了进攻动力学，这些动力在角度动量补偿温度下变得刚性，并且呈现电流驱动的动力学表现出更为复杂的行为，这取决于每个sublattice的极化因子。重要的是，我们的分析还提供了对当前驱动结构域壁运动的最新证据的新解释，其中壁根据温度而沿当前移动。此外，我们的方法能够证实这些系统发现的大型非绝热有效参数。
Domain wall motion along ferrimagnets is evaluated using micromagnetic simulations and a collective-coordinates model, both considering two sublattices with independent parameters. Analytical expressions are derived for strips on top of either a heavy metal or a substrate with negligible interfacial Dzyaloshinskii-Moriya Interaction. The work focuses its findings in this latter case, with a field-driven domain wall motion depicting precessional dynamics which become rigid at the angular momentum compensation temperature, and a current-driven dynamics presenting more complex behavior, depending on the polarization factors for each sublattice. Importantly, our analyses provide also novel interpretation of recent evidence on current-driven domain wall motion, where walls move either along or against the current depending on temperature. Besides, our approach is able to substantiate the large non-adiabatic effective parameters found for these systems.
