发表机构
Rice University; Boston College; University of Houston; University of Maryland, College Park; Canadian Institute for Advanced Research（莱斯大学; 波士顿学院; 休斯顿大学; 马里兰大学帕克分校; 加拿大高级研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出通过室温附近有序的稀土磁体实现高温拓扑自旋纹理的策略，在Gd₅Pb₃中观测到远超同类体系的拓扑霍尔效应，为近室温拓扑自旋纹理研究提供了新路径。
AI 中文摘要
局域矩体系中的拓扑自旋纹理因具有大磁矩、强自旋轨道耦合（SOC）及高可调性，在技术应用中展现出巨大潜力。寻找在室温附近稳定的新型自旋纹理，对最大化其应用潜力至关重要。本研究提出一种通过识别在室温或近室温有序的稀土（R）磁体，实现高温下拓扑自旋纹理的策略。我们在其中一种磁体——六角结构的Gd₅Pb₃中验证了该策略的可行性，其居里温度T_C=285 K。拓扑自旋纹理的证据来自拓扑霍尔效应（THE），在Gd₅Pb₃中，该效应出现在T=100-200 K的温度区间，比其他已报道的稀土基体系高出一个数量级。我们的研究为探索SOC、各向异性交换、几何阻挫及磁相互作用在稳定拓扑自旋纹理中的作用提供了契机，并为在稀土基磁体中实现近室温拓扑自旋纹理提供了途径。
英文摘要
Topological spin textures in local moment systems hold great promise for technological applications due to their large magnetic moments, strong spin-orbit coupling (SOC), and high tunability. Finding new spin textures that are stable near room temperature is paramount to maximizing their potential for applications. Here, we provide a strategy for realizing topological spin textures at high temperatures by identifying rare earth ($R$) magnets ordering at or near room temperature. We demonstrate the feasibility of this strategy in one of these magnets, hexagonal Gd$_5$Pb$_3$, which orders at $T_C$ = 285 K. The indication for topological spin textures comes from topological Hall effect (THE), which, in Gd$_5$Pb$_3$, occurs between $T$ = 100 - 200 K, an order of magnitude higher temperature than in other reported $R$-based systems. Our results present an opportunity to explore the role of SOC, anisotropic exchange, geometric frustration, and magnetic interactions in stabilizing topological spin textures, and provide a pathway toward realizing them near room temperature in $R$-based magnets.
