Dzyaloshinskii-Moriya domain walls in magnetic nanotubes
Dzyaloshinskii-Moriya domain walls in magnetic nanotubes
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DOI：
10.1103/physrevb.93.054418
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发表时间：
2016-02-22
影响因子：
3.7
通讯作者：
Tretiakov, Oleg A.
中科院分区：
文献类型：
--
作者：
Goussev, Arseni;Robbins, J. M.;Tretiakov, Oleg A.
我们利用自旋轨道诱导的 Dzyaloshinskii-Moriya 相互作用（DMI）对铁磁纳米管的畴壁静力学和动力学进行了分析研究。即使在静力学水平上，空间曲率和 DMI 的相互作用也会产生戏剧性的效果：磁畴变得手性扭曲，导致磁畴壁更加紧凑。这些手性结构的动力学表现出一些有趣的特征。在微弱的施加电流下，它们的传播不会失真。通过施加外部磁场，动态响应进一步丰富：磁畴壁速度变得依赖于手性，并且可以通过改变 DMI 来显着增加。这些特性允许使用 DMI 增强对纳米管中畴壁运动的控制，从而增加它们作为未来逻辑和存储设备中信息载体的潜力。
We present an analytic study of domain-wall statics and dynamics in ferromagnetic nanotubes with spin-orbit-induced Dzyaloshinskii-Moriya interaction (DMI). Even at the level of statics, dramatic effects arise from the interplay of space curvature and DMI: the domains become chirally twisted, leading to more compact domain walls. The dynamics of these chiral structures exhibits several interesting features. Under weak applied currents, they propagate without distortion. The dynamical response is further enriched by the application of an external magnetic field: the domain-wall velocity becomes chirality dependent and can be significantly increased by varying the DMI. These characteristics allow for enhanced control of domain-wall motion in nanotubes with DMI, increasing their potential as information carriers in future logic and storage devices.