Goodge Berit H, Gonzalez Oscar, Xie Lilia S, Bediako D Kwabena
Department of Chemistry, University of California, Berkeley, California 94720, United States.
Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.
ACS Nano. 2023 Oct 24;17(20):19865-19876. doi: 10.1021/acsnano.3c04203. Epub 2023 Oct 6.
Transition metal intercalated transition metal dichalcogenides (TMDs) are promising platforms for next-generation spintronic devices based on their wide range of electronic and magnetic phases, which can be tuned by varying the host lattice or intercalant's identity, stoichiometry, or spatial order. Some of these compounds host a chiral magnetic phase in which the helical winding of magnetic moments propagates along a high-symmetry crystalline axis. Previous studies have demonstrated that variation in intercalant concentrations can have a dramatic effect on the formation of chiral domains and ensemble magnetic properties. However, a systematic and comprehensive study of how atomic-scale order and disorder impact these chiral magnetic textures is so far lacking. Here, we leverage a combination of imaging modes in the (scanning) transmission electron microscope (S/TEM) to directly probe (dis)order across multiple length scales and show how subtle changes in the atomic lattice can tune the mesoscale spin textures and bulk magnetic response in CrNbS, with direct implications for the fundamental understanding and technological implementation of such compounds.
过渡金属插层过渡金属二硫属化物（TMDs）因其广泛的电子和磁相，有望成为下一代自旋电子器件的平台，这些相可通过改变主体晶格或插层剂的种类、化学计量比或空间顺序来调节。其中一些化合物具有手性磁相，其中磁矩的螺旋缠绕沿高对称晶轴传播。先前的研究表明，插层剂浓度的变化会对手性畴的形成和整体磁性能产生显著影响。然而，目前还缺乏对原子尺度的有序和无序如何影响这些手性磁织构的系统而全面的研究。在这里，我们利用（扫描）透射电子显微镜（S/TEM）中的多种成像模式组合，直接探测多个长度尺度上的（无序）有序，并展示了晶格中的细微变化如何调节CrNbS中的中尺度自旋织构和体磁响应，这对这类化合物的基本理解和技术应用具有直接意义。
