Spincaloric transport and thermal spin transfer torque in thin film nanostructures

薄膜纳米结构中的自旋热量输运和热自旋转移扭矩

• 批准号: 197908182
• 负责人: Professor Dr. Christian Back
• 金额: --
• 依托单位: Institut für Experimentelle und Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/197908182?language=en
• 关键词: Spincaloric; transport; thermal; spin; transfer

The spin Seebeck effect has been observed in three distinctly different materials and so far no common theory exists to describe these observations. Here, we propose to investigate several aspects of the spin Seebeck effect in metals (Permalloy, FeCo alloys), insulators (EuO) and half metals (Fe3Si). We will perform all electrical measurements on extended films as well as on microstructured systems supported by investigations of the spin pumping effect and of spin wave propagation. Furthermore we will address thermally induced spin currents in lateral devices (domain wall motion by thermally induced spin currents) and thermally induced spin transfer torque in multilayers. The former will be investigated in a static Kerr microscope combined with femtosecond laser heating while the latter will be investigated in an all optical pump-probe experiment.

在三种截然不同的材料中观察到了自旋塞贝克效应，到目前为止还没有共同的理论来描述这些观察到的现象。在这里，我们建议研究金属(坡莫合金、FeCo合金)、绝缘体(EuO)和半金属(Fe3Si)中自旋Seebeck效应的几个方面。我们将在自旋泵浦效应和自旋波传播的研究支持下，对扩展的薄膜和微结构系统进行所有的电学测量。此外，我们还将讨论横向器件中的热致自旋电流(由热致自旋电流引起的磁区壁运动)和多层膜中的热致自旋转移扭矩。前者将在静态克尔显微镜中与飞秒激光加热相结合进行研究，而后者将在全光泵浦-探测实验中进行研究。