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arXiv · 2208.04503

Epitaxial growth of high quality $Mn_3Sn$ thin films by pulsed laser deposition

Dong Gao·Zheng Peng·Ningbin Zhang·Yunfei Xie·Yucong Yang·Weihao Yang·Shuang Xia·Wei Yan·Longjiang Deng·Tao Liu·Jun Qin·Xiaoyan Zhong·Lei Bi
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Abstract

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 $\left| \Delta R_H\right|$=3.02 $\mu\Omega\cdot cm$, and longitudinal magneto-optical Kerr effect (LMOKE) with $\theta_K$ = 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.

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Dong Gao, Zheng Peng, Ningbin Zhang, Yunfei Xie, Yucong Yang, Weihao Yang, Shuang Xia, Wei Yan, Longjiang Deng, Tao Liu, Jun Qin, Xiaoyan Zhong, Lei Bi. 2022-08-09. Epitaxial growth of high quality $Mn_3Sn$ thin films by pulsed laser deposition. https://doi.org/10.1063/5.0124578

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