Layer-Dependent Mechanical Properties and Enhanced Plasticity in the Van der Waals Chromium Trihalide Magnets.
Layer-Dependent Mechanical Properties and Enhanced Plasticity in the Van der Waals Chromium Trihalide Magnets.
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货车范德瓦尔斯三卤化铬磁体中的层相关机械性能和增强的塑性。
DOI：
10.1021/acs.nanolett.0c04794
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发表时间：
2021-04-28
期刊：
影响因子：
10.8
通讯作者：
Navarro-Moratalla E
中科院分区：
文献类型：
--
作者：
Cantos-Prieto F;Falin A;Alliati M;Qian D;Zhang R;Tao T;Barnett MR;Santos EJG;Li LH;Navarro-Moratalla E
磁性材料的力学性能对于磁弹性理论的发展和应变调制磁性器件的优化具有重要意义。尤其是，二维(2D)磁体有望将这些概念扩展到低维物理和超薄设备领域。然而，到目前为止，还没有对原型的二维三卤化铬磁体家族的本征机械性能进行实验研究。在这里，我们报道了原子薄CrCl3和CrI3的室温层相关力学性能，发现这两种双层膜的杨氏模数分别为62.1和43.4 Gpa，最大持续应变分别为6.49%和6.09%，断裂强度分别为3.6和2.2 Gpa。这描述了这些材料的突出可塑性，这在大块晶体中得到了定性的证明。本论文的研究将有助于2D磁体在磁致伸缩和柔性器件中的应用。
The mechanical properties of magnetic materials are instrumental for the development of magnetoelastic theories and the optimization of strain-modulated magnetic devices. In particular, two-dimensional (2D) magnets hold promise to enlarge these concepts into the realm of low-dimensional physics and ultrathin devices. However, no experimental study on the intrinsic mechanical properties of the archetypal 2D magnet family of the chromium trihalides has thus far been performed. Here, we report the room temperature layer-dependent mechanical properties of atomically thin CrCl3 and CrI3, finding that the bilayers have Young’s moduli of 62.1 and 43.4 GPa, highest sustained strains of 6.49% and 6.09% and breaking strengths of 3.6 and 2.2 GPa, respectively. This portrays the outstanding plasticity of these materials that is qualitatively demonstrated in the bulk crystals. The current study will contribute to the applications of the 2D magnets in magnetostrictive and flexible devices.
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