论文标题
在铁磁GDFECO合金膜中观察自旋 - 动力
Observation of spin-motive force in ferrimagnetic GdFeCo alloy films
论文作者
论文摘要
非均匀的磁性结构产生了新兴的电磁现象，例如拓扑厅效应和自旋 - 动力（SMF）。但是，关于SMF的实验报告很少，SMF和材料参数之间的关系尚不清楚。在这项研究中，我们使用自旋刺激诱导的铁磁共振方法研究了铁磁GDFECO合金膜中的SMF，并阐明了这种关系。检测到的SMF的幅度比GD掺杂的过渡金属合金FECO的幅度大，并在平面内和垂直磁化膜之间的边界的GD组成附近达到最大值。根据分析计算，增强与磁化进动的轨迹有关。此外，我们发现由磁共振引起的SMF与阻尼常数的平方成反比。
Non-uniform magnetic structures produce emergent electromagnetic phenomena such as the topological Hall effect and the spin-motive force (SMF). The experimental reports on the SMF, however, are very few and the relationship between the SMF and material parameters is still unclear. In this study, we investigated the SMF in ferrimagnetic GdFeCo alloy films using the spin-torque-induced ferromagnetic resonance method and clarified the relationship. The amplitude of the detected SMF becomes larger than that of the transition metal alloy FeCo by the Gd doping and reaches the maximum near a Gd composition of the boundary between in-plane and perpendicularly magnetized films. According to the analytical calculation, the enhancement is related to the trajectory of the magnetization precession. Moreover, we find that the SMF induced by the magnetic resonance is inversely proportional to the square of the damping constant.
