论文标题
铁磁性磁光反应中的磁光响应
Terahertz magneto-optical response in ferromagnetic Fe-Co-Al alloys
论文作者
论文摘要
我们研究了Terahertz频率范围内Fe-Co-Al有序合金的磁光能。使用标准基于Kubo的方法来计算$σ_{xy}（ω）$的内在部分，我们在Terahertz范围内发现了$σ_{xy} $的强依赖性。例如，我们发现低于10〜thz Co $ _3 $ Al的$σ_{xy} $，而高于10〜thz的$σ_{xy} $减少了约50次。此外，我们发现$σ_{xy} $的强依赖性对化学成分。例如，我们发现在Fe中添加Al会更改$σ_{Xy} $的符号，而将CO添加到Fe中会导致$σ_{xy} $的非单调依赖性在CO浓度上。
We study the magneto-optical properties of Fe-Co-Al ordered alloys in the terahertz range of frequencies. Using the standard Kubo-based approach to compute intrinsic part of the $σ_{xy}(ω)$ we find a strong dependence of $σ_{xy}$ on $ω$ in the terahertz range. For example, we find that below 10~THz Co$_3$Al has nearly constant $σ_{xy}$ and that above 10~THz it is reduced by about 50 times. Furthermore, we find a strong dependence of $σ_{xy}$ on the chemical composition. For example, we find that the addition of Al to Fe changes the sign of $σ_{xy}$, while the addition of Co to Fe leads to a nonmonotonic dependence of $σ_{xy}$ on Co concentration.
