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Electric-field guiding of magnetic skyrmions

机译:磁性天体的电场引导

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We theoretically study equilibrium and dynamic properties of nanosized magnetic skyrmions in thin magnetic films with broken inversion symmetry, where an electric field couples to magnetization via spin-orbit coupling. Based on a symmetry-based phenomenology and micromagnetic simulations we show that this electric-field coupling, via renormalizing the micromagnetic energy, modifies the equilibrium properties of the skyrmion. This change, in turn, results in a significant alteration of the current-induced skyrmion motion. Particularly, the speed and direction of the skyrmion can be manipulated by designing a desired energy landscape electrically, which we describe within Thiele's analytical model and demonstrate in micromagnetic simulations including electric-field-controlled magnetic anisotropy. We additionally use this electric-field control to construct gates for controlling skyrmion motion exhibiting a transistorlike and multiplexerlike function. The proposed electric-field effect can thus provide a low-energy electrical knob to extend the reach of information processing with skyrmions.
机译:我们从理论上研究了具有反转反转对称性的薄磁性薄膜中纳米级磁性天文离子的平衡和动态性质,其中电场通过自旋轨道耦合耦合到磁化强度。基于基于对称的现象学和微磁模拟,我们表明,这种电场耦合通过使微磁能重新归一化,可以改变天蝎子的平衡特性。这种变化反过来导致电流引起的天体运动的明显改变。特别是,可以通过电气设计所需的能量分布来操纵天体的速度和方向,我们在Thiele的分析模型中对此进行了描述,并在包括电场控制的磁各向异性的微磁模拟中进行了演示。我们还使用此电场控制来构造门,以控制具有象晶体管和多路复用器功能的天体运动。所提出的电场效应因此可以提供低能量的电旋钮,以扩展利用天体离子进行信息处理的范围。

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