论文标题
电场驱动的非挥发性多状态转换在多效异质结构中
Electric-field-driven Non-volatile Multi-state Switching of Individual Skyrmions in a Multiferroic Heterostructure
论文作者
论文摘要
Skyrmions的电气操纵吸引了其丰富的物理和有希望的应用引起了极大的关注。迄今为止，这种操作主要是通过自旋转移扭矩或自旋轨道扭矩效应来实现的。但是，该方案是耗能的，可能会产生大量的焦耳加热。为了降低基于天空的设备温度升高的能量耗散和风险，一种有效的解决方案是将电场代替电流用作刺激。在这里，我们通过磁力机械效应在室温下在纳米结构的铁磁/铁电异质结构中实现了对天际的电场操纵。有趣的是，这种操作是非挥发性的，并且具有多状态特征。数值模拟表明，天空的电场操作源自有效磁各向异性和dzyaloshinskii-Moriya相互作用的应变介导的修饰。我们的结果为构建低能消耗，非易失性和基于多态的基于天际的自旋装置开了一个方向。
Electrical manipulation of skyrmions attracts considerable attention for its rich physics and promising applications. To date, such a manipulation is realized mainly via spin-polarized current based on spin-transfer torque or spin-orbital torque effect. However, this scheme is energy-consuming and may produce massive Joule heating. To reduce energy dissipation and risk of heightened temperatures of skyrmion-based devices, an effective solution is to use electric field instead of current as stimulus. Here, we realize an electric-field manipulation of skyrmions in a nanostructured ferromagnetic/ferroelectrical heterostructure at room temperature via an inverse magneto-mechanical effect. Intriguingly, such a manipulation is non-volatile and exhibits a multi-state feature. Numerical simulations indicate that the electric-field manipulation of skyrmions originates from strain-mediated modification of effective magnetic anisotropy and Dzyaloshinskii-Moriya interaction. Our results open a direction for constructing low-energy-dissipation, non-volatile, and multi-state skyrmion-based spintronic devices.
