Influence of thermal gradients and spin currents on current driven domain wall motion

我们已经研究了温度梯度和/或自旋波应用的效果，以减少移动磁畴壁所需的阈值电流密度，或增加壁速度。利用焦耳热局部加热导体，我们开发了一个系统，具有0.2K/5 μ m的温度梯度。自旋波的激发和检测是使用高频电测量进行的。顺便说一句，我们发现，畴壁形核场减少时，局部微波场，附近的铁磁共振频率，被施加。然而，场驱动的畴壁速度表现出很小的依赖性的应用程序的传播自旋波。

We have studied the effect of temperature gradient and/or spin wave application to reduce the threshold current density needed to move a magnetic domain wall, or to increase the wall velocity. Using joule heating to locally heat a conductor, we developed a system that has temperature gradient of 0.2K/5 um. Spin wave excitations and its detection was carried out using high frequency electrical measurements. Incidentally, we find that the domain wall nucleation field was reduced when a localized microwave field, near to the ferromagnetic resonance frequency, was applied. However, the field driven domain wall velocity showed little dependence on the application of the propagating spin waves.