论文标题
脉冲激光沉积的高质量$ MN_3SN $薄膜的外延生长
Epitaxial growth of high quality $Mn_3Sn$ thin films by pulsed laser deposition
论文作者
论文摘要
非电视抗抗铁磁铁WEYL半准$ MN_3SN $最近引起了极大的研究兴趣。尽管在$ MN_3SN $中观察到了较大的异常霍尔效应，异常的Nernst效果和磁光效应，但大多数研究都是基于单晶的。到目前为止，种植具有运输和光学特性的高质量外延$ MN_3SN $薄膜仍然具有挑战性。在这里，我们报告了由脉冲激光沉积（PLD）制造的外延$ MN_3SN $薄膜的结构，光学和传输特性。高度定向的$ Mn_ {3+X} sn_ {1-x} $（0001）和（11 $ \ bar2 $ 0）的外延膜在单晶$ al_2o_3 $和mgo substrates上成功增长。大型异常大厅效应（AHE）最多$ \ left | ΔR_H\ right | $ = 3.02 $μω\ CDOT CM $，以及纵向磁光kerr效应（LMOKE），其$θ_K$ = 38.1 mdeg在633 nm波长下在300 K温度下测量，可与$ MN_3SN $ $单晶相媲美。我们的工作表明，可以通过PLD制造高质量的$ MN_3SN $外延薄膜，为将来的设备应用铺平了道路。
Non-collinear antiferromagnet Weyl semimetal $Mn_3Sn$ have attracted great research interest recently. Although large anomalous Hall effect, anomalous Nernst effect and magneto-optical effect have been observed in $Mn_3Sn$, most studies are based on single crystals. So far, it is still challenging to grow high quality epitaxial $Mn_3Sn$ thin films with transport and optical properties comparable to their single crystal counterparts. Here, we report the structure, magneto-optical and transport properties of epitaxial $Mn_3Sn$ thin films fabricated by pulsed laser deposition (PLD). Highly oriented $Mn_{3+x}Sn_{1-x}$ (0001) and (11$\bar2$0) epitaxial films are successfully growth on single crystalline $Al_2O_3$ and MgO substrates. Large anomalous Hall effect (AHE) up to $\left| ΔR_H\right|$=3.02 $μΩ\cdot cm$, and longitudinal magneto-optical Kerr effect (LMOKE) with $θ_K$ = 38.1 mdeg at 633 nm wavelength are measured at 300 K temperature, which are comparable to $Mn_3Sn$ single crystals. Our work demonstrates that high quality $Mn_3Sn$ epitaxial thin films can be fabricated by PLD, paving the way for future device applications.
