论文标题
Terahertz从交换耦合的合成抗fiferromagnet发射
Terahertz Emission From an Exchange-Coupled Synthetic Antiferromagnet
论文作者
论文摘要
我们报告了女性/ru/ru/femnpt和pt/cofeb/ru/cofeb/pt合成反铁磁铁（SAF）结构的terahertz发射。前者是通过异常的大厅效应，而后者是通过反旋转厅效应。两种铁磁层的反平行对齐导致Terahertz发射峰幅度几乎是两倍，对于相应的单层或双层发射器，厚度相同。此外，我们通过模拟和实验都证明了Terahertz发射提供了一种强大的工具，可以探测SAF结构中单个铁磁层的磁化反转过程，因为Terahertz信号与两个铁磁层的磁化磁化；
We report on terahertz emission from FeMnPt/Ru/FeMnPt and Pt/CoFeB/Ru/CoFeB/Pt synthetic antiferromagnet (SAF) structures upon irradiation by a femtosecond laser; the former is via the anomalous Hall effect, whereas the latter is through the inverse spin Hall effect. The antiparallel alignment of the two ferromagnetic layers leads to a terahertz emission peak amplitude that is almost double that for a corresponding single-layer or bilayer emitter with the same equivalent thickness. In addition, we demonstrate by both simulation and experiment that terahertz emission provides a powerful tool to probe the magnetization reversal processes of individual ferromagnetic layers in a SAF structure, as the terahertz signal is proportional to the vector difference of the magnetizations of the two ferromagnetic layers.
