论文标题
通过电气平均值在磁性纳米线中促进域壁注射
Facilitating domain wall injection in magnetic nanowires by electrical means
论文作者
论文摘要
我们研究了如何通过电手段促进手动铁磁纳米线中域壁的注射。我们计算了临界电流密度，该密度以高于该域壁被注入纳米线的临界电流密度，具体取决于材料参数和相互作用的来源，包括自旋转移扭矩以及自旋轨道扭矩。我们证明，dzyaloshinskii-moriya相互作用可以显着降低所需的临界电流，以注入dzyaloshinskii-moriya相互作用所青睐的域壁类型。我们发现，在手性磁铁中，只能通过旋转轨道扭矩来修改系统的基态方向，从而通过旋转轨道扭曲。相比之下，对于旋转转移刺激诱导的域壁的脱落，我们表明分别存在两个不同的临界电流密度，分别针对两种不同的域壁手性。 此外，对于通过自旋转移扭矩连续创建域壁，我们发现域壁之间的相互作用不能被忽略，甚至可能导致连续域壁的成对消灭具有相反chiralities的连续域壁。
We investigate how to facilitate the injection of domain walls in chiral ferromagnetic nanowires by electrical means. We calculate the critical current density above which domain walls are injected into the nanowire depending on the material parameters and the source of interaction including spin-transfer torques as well as spin-orbit torques. We demonstrate that the Dzyaloshinskii-Moriya interaction can significantly reduce the required critical current to inject the types of domain walls favored by the Dzyaloshinskii-Moriya interaction. We find that in chiral magnets it is only possible to shed a single domain wall by means of spin-orbit torques, as they modify the ground state orientation of the system. In contrast, for spin-transfer-torque induced shedding of domain walls, we show that there exist two different critical current densities for the two different domain wall chiralities, respectively. Additionally, for the consecutive creation of domain walls by means of spin-transfer torques, we find that the interaction between the domain walls cannot be neglected and even may lead to the pairwise annihilation of consecutive domain walls with opposite chiralities.
