Spincaloric transport and thermal spin transfer torque in thin film nanostructures

自旋塞贝克效应已经在三种截然不同的材料中观察到，到目前为止还没有共同的理论来描述这些观察结果。在这里，我们建议调查的几个方面的自旋塞贝克效应在金属（坡莫合金，FeCo合金），绝缘体（EuO）和半金属（Fe3Si）。我们将进行所有的电子测量扩展的薄膜，以及对微结构系统的自旋泵效应和自旋波传播的调查支持。此外，我们将解决热诱导自旋电流在横向设备（畴壁运动的热诱导自旋电流）和热诱导自旋转移扭矩在多层膜。前者将在静态克尔显微镜结合飞秒激光加热进行研究，而后者将在全光泵浦探测实验中进行研究。

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.