Thermal spin transfer torque dynamics and tunnelling magneto Seebeck effect in magnetic nanostructures

在这个项目中，将研究热自旋力矩对铁磁纳米结构的磁化动力学的影响。纳米结构自旋阀和磁性隧道结电池将通过溅射沉积和洁净室图案化来制造。纳米结构的铁磁层之间的热梯度将通过局部光学或欧姆加热产生。热自旋电流对磁化动力学的影响将通过直流和高频磁输运实验进行研究。时域和频域的磁输运铁磁共振测量和测量的运输磁噪声谱将允许证明由热自旋电流引起的磁旋进激发，从而证明在纳米结构中的热自旋转移扭矩。室温实验将得到不同低温下测量的支持。热自旋转移扭矩的效率将研究未来可能的应用。这个项目将提供一个有前途的新机制的自旋热输运的深入了解，并将支持潜在的未来应用的热自旋扭矩在磁性纳米结构。

In this project, the effect of thermal spin torques on the magnetization dynamics of ferromagnetic nanostructures will be investigated. Nanostructured spin valves and magnetic tunnel junction cells will be fabricated by sputter deposition and clean room patterning. Thermal gradients between the ferromagnetic layers of the nanostructures will be generated by local optical or ohmic heating. The influence of thermal spin currents on the magnetization dynamics will be investigated by dc and high frequency magneto transport experiments. Time and frequency domain magneto transport ferromagnetic resonance measurements and measurements of the transport magnetic noise spectrum will allow to evidence magnetic precessional excitations induced by thermal spin currents and thus to evidence thermal spin transfer torque in the nanostructures. Room temperature experiments will be supported by measurements at variable cryogenic temperatures. The efficiency of thermal spin transfer torques will be studied with respect to possible future applications. This project will provide a deep insight into a promising new mechanism of spin caloric transport and will underpin potential future applications of thermal spin torques in magnetic nanostructures.