搜索

x
中国物理学会期刊

Dzyaloshinskii-Moriya相互作用驱动的磁动力学

CSTR: 32037.14.aps.75.20251635

Magnetic dynamics driven by Dzyaloshinskii-Moriya interaction

CSTR: 32037.14.aps.75.20251635
PDF
HTML
导出引用
  • Dzyaloshinskii-Moriya相互作用(DMI)作为一种反对称交换相互作用, 不仅是稳定非共线手性磁结构的关键机制之一, 也在多场调控磁动力学中扮演着核心角色, 为高密度、低功耗、非易失性自旋电子器件的设计与开发提供了新路径. 本文聚焦于DMI驱动的磁动力学操控, 首先回顾了DMI的物理机制及主要材料体系, 进而系统介绍了DMI与自旋-轨道力矩协同作用下实现零磁场确定性磁化翻转, 以及电流驱动手性磁动力学的国内外研究进展. 同时, 详细梳理了近年来基于DMI实现磁动力学电操控的相关理论与实验成果, 包括电场调控DMI的多种物理机制、DMI主导的拓扑磁态的电场操控策略, 以及通过拓扑磁结构传递自旋角动量的全电场DMI力矩磁动力学操控机制, 并进一步讨论了基于上述物理效应的自旋电子器件设计方案及器件应用面临的问题. 最后, 对当前DMI驱动的磁动力学研究现状进行总结, 并从磁动力学理论、DMI材料开发以及器件应用三个层面, 展望了该领域未来面临的挑战与发展机遇.

     

    The Dzyaloshinskii-Moriya interaction (DMI), as an antisymmetric exchange interaction, is one of the key mechanisms for stabilizing noncollinear chiral magnetic structures. It plays an important role in the multi-field control of magnetic dynamics and provides a new pathway for designing and developing high-density, low-power, non-volatile spintronic devices. This study focuses on the manipulation of magnetic dynamics driven by DMI, reviewing theoretical studies and frontier technological explorations on DMI-assisted current-driven magnetic dynamics and DMI-based electric field control of magnetic dynamics. Since Dzyaloshinskii first proposed this kind of antisymmetric exchange interaction in 1957, the research on DMI has developed from fundamental physical research to practical device application exploration. The DMI theoretical framework has been progressively refined through the developments by Moriya, Fert, and Levy. Moreover, DMI materials have also expanded from B20-type compounds to heterostructures and two-dimensional materials. The study of DMI-driven magnetic dynamics has opened a new way for the next-generation spintronic devices. DMI-assisted current-driven magnetic dynamics include deterministic magnetization switching under zero magnetic field through the synergistic effect of DMI and spin-orbit torques, as well as low-power current-driven dynamics achieved through effective coupling between spin current and chiral magnetic texture. Electric control of magnetic dynamics based on DMI includes various physical mechanisms for electric field control of DMI, electric field manipulation strategies for DMI-dominated topological magnetic states, and all-electric DMI torque-driven magnetic dynamics that transfer spin angular momentum through topological magnetic structures. In recent advances, the critical current density for field-free magnetization switching has been reduced to 105 A/cm2, and skyrmion velocities have reached the km/s range. A variety of methods for electric-field control of DMI, mechanisms for manipulating topological magnetic structures through electric fields, and all-electric device design schemes are proposed. These advances reflect significant progress of DMI-driven magnetic dynamics. However, there are still substantial challenges in the fields of magnetic dynamics theory, DMI material development, and device applications. Addressing these challenges will continue to promote breakthroughs in DMI-related theoretical innovations, material design, and device applications, contributing to the development of the next-generation low-power, high-performance spintronic devices.

     

    目录

    /

    返回文章
    返回