All electrically manipulated ferrimagnetic skyrmions: creation, dynamic study and detection

所有电控亚铁磁斯格明子：创造、动态研究和检测

• 批准号: 448615609
• 负责人: Professor Dr. Christian Back
• 金额: --
• 依托单位: National Natural Science Foundation of China
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/448615609?language=en
• 关键词: electrically; manipulated; ferrimagnetic; skyrmions; creation

In the planned project, skyrmions in thin-film heterostructures of magnetic 3d-transition metals and rare earths will be investigated. Ferrimagnetic layer systems or alloys can form ferrimagnetic skyrmions in a certain temperature and composition range, which are also stable at the compensation point of the magnetization as well as at the compensation point of the angular momentum. At the compensation point, the so-called Skyrmion Hall angle, which is a measure of the lateral deflection of the Skyrmions under the influence of a force, approaches zero.In this project, the phase diagram of ferrimagnetic layer systems and alloys will be investigated by Lorentz transmission electron microscopy in order to optimize the layers produced by sputter deposition. Then the formation and manipulation of skyrmions will be investigated in suitable nanostructures, both statically and time-resolved. Finally, the electrical detection of skyrmions using the tunnel magnetoresistance will be realized in a skyrmion racetrack and a skyrmion racetrack prototype will be demonstrated.

在计划中的项目中，将研究磁性3d过渡金属和稀土的薄膜异质结构中的skyrmion。亚铁磁层系统或合金可以在一定的温度和成分范围内形成亚铁磁skyrmion，其在磁化的补偿点以及角动量的补偿点处也是稳定的。在补偿点，所谓的Skyrmion霍尔角，这是一个衡量的Skyrmion的影响下的力的横向偏转，接近零。在这个项目中，亚铁磁层系统和合金的相图将通过洛伦兹透射电子显微镜研究，以优化溅射沉积产生的层。然后，形成和操纵skyrmions将在适当的纳米结构，静态和时间分辨。最后，利用隧道磁阻效应对skyrmion进行电学探测，并在skyrmion赛道上实现skyrmion赛道原型。