Electric-field control of skyrmions in multiferroic heterostructure via magnetoelectric coupling.
Electric-field control of skyrmions in multiferroic heterostructure via magnetoelectric coupling.
复制标题
多铁性异质结构中skyrmions的磁电耦合电场控制。
DOI：
10.1038/s41467-020-20528-y
复制
发表时间：
2021-01-12
影响因子：
16.6
通讯作者：
Zhao Y
中科院分区：
文献类型：
--
作者：
Ba Y;Zhuang S;Zhang Y;Wang Y;Gao Y;Zhou H;Chen M;Sun W;Liu Q;Chai G;Ma J;Zhang Y;Tian H;Du H;Jiang W;Nan C;Hu JM;Zhao Y
磁性多层膜中的室温天子体被认为是下一代自旋电子器件的候选材料。已经开发了几种方法来控制Skyrmions，但它们要么会导致显著的热量散失，要么需要在击穿阈值附近的超高电场。在这里，我们演示了在铁磁/铁电多异质结中，通过应变介导的磁电耦合对天子场的控制。我们通过在现场电场作用下的磁力显微镜展示了多个天子的非挥发产生、单个天子的可逆变形和湮灭的过程。实验表征了应变引起的垂直磁各向异性和界面Dzyaloshinskii-Moriya相互作用强度的变化。这些实验结果与微磁模拟相结合，证明了应变介导的磁电耦合(通过应变引起的垂直磁各向异性和界面Dzyaloshinskii-Moriya相互作用的变化)是观测到的Skyrmions电场控制的原因。我们的工作为研究多铁性异质结中Skyrmion的电场控制提供了平台，并为基于Skyrmion的自旋电子学的更高能效铺平了道路。常见的控制天象的方法会导致大量的热量散失，或者在击穿阈值附近需要很高的电场。在这里，作者证明了在多铁性异质结中，通过应变介导的磁电耦合对Skyrmions的电场控制。
Room-temperature skyrmions in magnetic multilayers are considered to be promising candidates for the next-generation spintronic devices. Several approaches have been developed to control skyrmions, but they either cause significant heat dissipation or require ultrahigh electric fields near the breakdown threshold. Here, we demonstrate electric-field control of skyrmions through strain-mediated magnetoelectric coupling in ferromagnetic/ferroelectric multiferroic heterostructures. We show the process of non-volatile creation of multiple skyrmions, reversible deformation and annihilation of a single skyrmion by performing magnetic force microscopy with in situ electric fields. Strain-induced changes in perpendicular magnetic anisotropy and interfacial Dzyaloshinskii–Moriya interaction strength are characterized experimentally. These experimental results, together with micromagnetic simulations, demonstrate that strain-mediated magnetoelectric coupling (via strain-induced changes in both the perpendicular magnetic anisotropy and interfacial Dzyaloshinskii–Moriya interaction is responsible for the observed electric-field control of skyrmions. Our work provides a platform to investigate electric-field control of skyrmions in multiferroic heterostructures and paves the way towards more energy-efficient skyrmion-based spintronics. The common approaches to control of skymions cause significant heat dissipation or require high electric fields near the breakdown threshold. Here, the authors demonstrate electric-field control of skyrmions through strain-mediated magnetoelectric coupling in multiferroic heterostructures.