Biaxial Strain-Mediated Room Temperature Ferromagnetism of ReS2 Web Buckles
Biaxial Strain-Mediated Room Temperature Ferromagnetism of ReS2 Web Buckles
复制标题
ReS2 网状扣的双轴应变介导室温铁磁性
DOI：
10.1002/aelm.201900814
复制
发表时间：
2019
影响因子：
6.2
通讯作者：
Zhang Lei
中科院分区：
文献类型：
--
作者：
Ren Hongtao;Xiang Gang;Lu Jiating;Zhang Xi;Zhang Lei
经常观察到刚性基底上薄膜的屈曲驱动分层，这导致膜基器件的劣化或失效。然而，它是第一次观察到，网络的掺杂可以增强PAD-生长的ReS 2薄膜的室温铁磁性。本文首次采用聚合物辅助沉积法（PAD）制备了具有网状结构的室温铁磁ReS 2薄膜。使用光学、电子、原子力显微镜和X射线光电子能谱仪表征样品的形态和晶体结构。通过结合基于密度泛函理论的计算和包括拉曼光谱、荧光光谱和超导量子干涉仪（SQUID）磁强计的实验技术，进一步探讨了腹板屈曲引起的应变和铁磁性能之间的关系。结果表明，双轴应变对ReS 2样品的室温铁磁性具有很强的调谐效应，这表明应变工程在低维自旋电子器件中具有重要的应用。
Buckling‐driven delamination of thin films on rigid substrates is frequently observed, which leads to deterioration or failure of the film‐based devices. However, it is observed for the first‐time that web buckles could enhance room‐temperature ferromagnetism in PAD‐grown ReS2thin films. Here, room‐temperature ferromagnetic ReS2thin films with web buckles are prepared by polymer‐assisted deposition (PAD) for the first time. The morphology and crystalline structure of the samples are characterized using optical, electron, atomic force microscopes and X‐ray photoelectron spectrometry. The relationship between the web buckle–induced strain and ferromagnetic properties is further explored by combing calculations based on density functional theory and experimental techniques including Raman spectroscopy, fluorescence spectroscopy, and superconducting quantum interference device (SQUID) magnetometry. The results reveal that the biaxial strain has a robust tuning effect on the room‐temperature ferromagnetism of ReS2samples, suggesting that strain engineering could have significant applications in low‐dimensional spintronic devices.