FePd2Te2:带有一维铁链的各向异性二维铁磁体

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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引用次数: 0

摘要

由于二维(2D)磁体在基础物理和自旋电子应用研究中的重要性,近年来二维(2D)磁体备受关注。在此,我们报告了一种新的三元化合物 FePd2Te2 的发现。它具有层状的准二维晶体结构,一维的 Fe 人字链沿着裂平面的 b 轴延伸。可以生长出厘米大小的 FePd2Te2 单晶体。对这些晶体进行的密度函数理论计算、机械剥离和原子力显微镜分析表明,它们是二维材料,可细化至 5 纳米。磁性表征表明,FePd2Te2 是一种宙平面铁磁体,Tc 为 183 K,具有很强的面内单轴磁性各向异性。磁阻和反常霍尔效应表明,FePd2Te2 片状铁磁体能保持较大的矫顽力。扫描隧道显微镜观察到了晶体孪生效应,这使得铁链在裂解面上呈直角弯曲,并产生了一种引人入胜的自旋纹理。我们的研究结果表明,FePd2Te2 是一种相关各向异性的二维磁体,可能会吸引多学科的研究兴趣。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains
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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