In this Letter, we present a material system with two ferrimagnetic GdxFe100-x layers where the relative orientation of the Fe magnetic moments can be set by temperature in the presence of an external magnetic field. We demonstrate that, depending on the relative alignment of the Fe moments, the spintronic emitter system can be either in a high- or in a low-amplitude terahertz emitting state. Nonmagnetic metal layers with opposite spin Hall angles were utilized for further improvement of the efficiency. This study opens a route for an efficient type of spintronic terahertz emitter system based on the ferrimagnetic properties of rare earth-3d transition metal alloys, which allows switching the emission state from high to low power.

中文翻译：

---

亚铁磁体实现的自旋电子太赫兹发射的热磁控制

在这封信中，我们提出了一个具有两个亚铁磁 GdxFe100-x 层的材料系统，其中 Fe 磁矩的相对取向可以在存在外部磁场的情况下通过温度设置。我们证明，根据 Fe 矩的相对排列，自旋电子发射器系统可以处于高振幅或低振幅太赫兹发射状态。具有相反自旋霍尔角的非磁性金属层被用于进一步提高效率。这项研究为基于稀土-3d 过渡金属合金的亚铁磁特性的高效自旋电子太赫兹发射器系统开辟了道路，该系统允许将发射状态从高功率切换到低功率。