Spin dynamics in van der Waals magnetic systems
Spin dynamics in van der Waals magnetic systems
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DOI：
10.1016/j.physrep.2023.09.002
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
Chu-zhou Tang;Laith Alahmed;Muntasir Mahdi;Y. Xiong;Jerad Inman;N. McLaughlin;C. Zollitsch;
中科院分区：
文献类型：
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作者：
Chu-zhou Tang;Laith Alahmed;Muntasir Mahdi;Y. Xiong;Jerad Inman;N. McLaughlin;C. Zollitsch;
原子单层磁性材料的发现激发了二维（2D）货车范德华（vdW）材料界的研究活动。该领域正在迅速发展，并且已经出现了一大类具有独特性质的2D vdW磁性化合物，这为研究原子薄极限下的磁性提供了理想的平台。同时，基于二维vdW磁体及其异质结构中的隧穿磁电阻和磁光效应，探索了自旋电子学和光电学应用的新兴概念，如自旋隧道场效应晶体管和自旋过滤器件。虽然磁基态已被广泛研究，自旋动力学的可靠表征和控制在设计超快自旋电子器件中起着至关重要的作用。铁磁共振（FMR）允许直接测量磁激发，这提供了对磁特性的关键参数的洞察，例如交换相互作用、磁各向异性、旋磁比、自旋轨道耦合、阻尼率和畴结构。在这篇综述文章中，我们提出了一个基本的进展，探测自旋动力学的二维vdW磁铁使用FMR技术的概述。鉴于这一领域的动态性质，我们主要集中在宽带FMR，光学FMR和自旋力矩FMR，以及它们在研究原型2D vdW磁体中的应用。最后，我们总结了实验室和同步加速器为基础的铁磁共振技术的最新进展，以及它们拓宽原子薄磁体研究途径的机会。
The discovery of atomic monolayer magnetic materials has stimulated intense research activities in the two-dimensional (2D) van der Waals (vdW) materials community. The field is growing rapidly and there has been a large class of 2D vdW magnetic compounds with unique properties, which provides an ideal platform to study magnetism in the atomically thin limit. In parallel, based on tunneling magnetoresistance and magneto-optical effect in 2D vdW magnets and their heterostructures, emerging concepts of spintronic and optoelectronic applications such as spin tunnel field-effect transistors and spin-filtering devices are explored. While the magnetic ground state has been extensively investigated, reliable characterization and control of spin dynamics play a crucial role in designing ultrafast spintronic devices. Ferromagnetic resonance (FMR) allows direct measurements of magnetic excitations, which provides insight into the key parameters of magnetic properties such as exchange interaction, magnetic anisotropy, gyromagnetic ratio, spin–orbit coupling, damping rate, and domain structure. In this review article, we present an overview of the essential progress in probing spin dynamics of 2D vdW magnets using FMR techniques. Given the dynamic nature of this field, we focus mainly on broadband FMR, optical FMR, and spin-torque FMR, and their applications in studying prototypical 2D vdW magnets. We conclude with the recent advances in laboratory- and synchrotron-based FMR techniques and their opportunities to broaden the horizon of research pathways into atomically thin magnets.