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arXiv · 2409.04800

FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains

Bingxian Shi·Yanyan Geng·Hengning Wang·Jianhui Yang·Chenglin Shang·Manyu Wang·Shuo Mi·Jiale Huang·Feihao Pan·Xuejuan Gui·Jinchen Wang·Juanjuan Liu·Daye Xu·Hongxia Zhang·Jianfei Qin·Hongliang Wang·Lijie Hao·Mingliang Tian·Zhihai Cheng·Guolin Zheng·Peng Cheng
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Abstract

Two-dimensional (2D) magnets have attracted significant attentions in recent years due to their importance in the research on both fundamental physics and spintronic applications. Here, we report the discovery of a new ternary compound FePd2Te2. It features a layered quasi-2D crystal structure with one-dimensional Fe zigzag chains extending along the b-axis in the cleavage plane. Single crystals of FePd2Te2 with centimeter-size could be grown. Density functional theory calculations, mechanical exfoliation and atomic force microscopy on these crystals reveal that they are 2D materialsthat can be thinned down to 5 nm. Magnetic characterization shows that FePd2Te2 is an easy-plane ferromagnet with Tc 183 K and strong in-plane uniaxial magnetic anisotropy. Magnetoresistance and anomalous Hall effect demonstrate that ferromagnetism could maintain in FePd2Te2 flakes with large coercivity. A crystal twinning effect is observed by scanning tunneling microscopy which makes the Fe chains right-angle bent in the cleavage plane and creates an intriguing spin texture. Our results show that FePd2Te2 is a correlated anisotropic 2D magnets that may attract multidisciplinary research interests.

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Bingxian Shi, Yanyan Geng, Hengning Wang, Jianhui Yang, Chenglin Shang, Manyu Wang, Shuo Mi, Jiale Huang, Feihao Pan, Xuejuan Gui, Jinchen Wang, Juanjuan Liu, Daye Xu, Hongxia Zhang, Jianfei Qin, Hongliang Wang, Lijie Hao, Mingliang Tian, Zhihai Cheng, Guolin Zheng, Peng Cheng. 2024-09-07. FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains. https://doi.org/10.1021/jacs.4c04910

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