面外类阻尼自旋轨道矩的材料与计量学

中文摘要 AI 辅助

如果能够开发出更高效的机制来切换具有垂直磁各向异性的纳米尺度磁性器件的磁化方向，那么新一代节能、高密度、非易失性存储器件的实现将成为可能。目前被广泛研究的一种有前景的策略是电流诱导的类阻尼自旋轨道矩，其具有强的非常规面外分量，而不仅仅是传统的面内分量。近年来，此类力矩已在多种材料平台中被报道，主要源于产生力矩的材料内部三类对称性破缺：单晶材料中的低晶体对称性、反铁磁有序和铁磁有序。尽管取得了这些进展，该领域仍然较为分散。使用不同方法的测量结果常常不一致，伪影被误解，定性观察有时被过度解读为技术前景的证据。本展望文章将对类阻尼自旋轨道矩提供批判性概述，分析能够产生此类力矩的材料类别、可用于量化力矩的实验方法，以及实现足以支撑可扩展磁性技术的力矩效率方面的进展。

英文摘要

A new generation of energy-efficient, high-density, and non-volatile memory devices could be enabled if a more efficient mechanism is developed for switching the magnetization orientation of nanoscale magnetic devices possessing perpendicular magnetic anisotropy. A promising strategy under widespread investigation is current-induced damping-like spin-orbit torque with a strong unconventional out-of-plane component, rather than only the conventional in-plane component. In recent years, such torques have been reported in a broad range of materials platforms, arising primarily from three classes of symmetry breaking within the material generating the torque: low crystal symmetry in single-crystalline materials, antiferromagnetic order, and ferromagnetic order. Despite this progress, the field remains fragmented. Measurements using different methods often disagree, artifacts have been misinterpreted, and qualitative observations are sometimes overinterpreted as evidence of technological promise. This Perspective will provide a critical overview of out-of-plane damping-like spin-orbit torques, analyzing the classes of materials which can generate such torques, the experimental methods by which the torques can be quantified, and the progress toward achieving torque efficiencies sufficient for scalable magnetic technologies.

发表机构

• Cornell University（康奈尔大学）
• Kavli Institute at Cornell, Cornell University（康奈尔大学卡弗里研究所）

机构由 AI 辅助整理，请以论文原文为准。