论文标题
洛伦兹透射电子显微镜中的Skyrmion密度的Opitando控制与电流脉冲
Operando Control of Skyrmion Density in a Lorentz Transmission Electron Microscope with Current Pulses
论文作者
论文摘要
磁性天空对自旋设备有希望。为了探索设备中天空的动力学特性，必不可少的纳米级方法来响应刺激的旋转纹理。在这里，我们将一种技术应用于Lorentz透射电子显微镜中手学磁性设备的操作电流脉冲。在具有界面dzyaloshinskii-moriya相互作用（DMI）的铁磁多层中，我们研究了由于缺陷引起的点状固定位点所定位的天空的创造和an灭。利用实验和微磁技术的结合，我们为在我们的研究中创造和an灭天空建立了热贡献。我们的工作揭示了一种控制天空密度的机制，该机制可以检查Skyrmion磁场稳定性随密度的函数。我们发现，高密度的天空状态比低密度状态或隔离的天空更稳定，或在磁场范围内抵抗an灭的隔离态，该磁场范围内单调地增加了密度。
Magnetic skyrmions hold promise for spintronic devices. To explore the dynamical properties of skyrmions in devices, a nanoscale method to image spin textures in response to a stimulus is essential. Here, we apply a technique for operando electrical current pulsing of chiral magnetic devices in a Lorentz transmission electron microscope. In ferromagnetic multilayers with interfacial Dzyaloshinskii-Moriya interaction (DMI), we study the creation and annihilation of skyrmions localized by point-like pinning sites due to defects. Using a combination of experimental and micromagnetic techniques, we establish a thermal contribution for the creation and annihilation of skyrmions in our study. Our work reveals a mechanism for controlling skyrmion density, which enables an examination of skyrmion magnetic field stability as a function of density. We find that high-density skyrmion states are more stable than low-density states or isolated skyrmions resisting annihilation over a magnetic field range that increases monotonically with density.
