Characterization of a spin-liquid state in the triangular lattice antiferromagnet PrTa7O19

Rare-earth based geometrically frustrated magnets represent a promising new avenue for the search of enigmatic quantum spin liquids (QSL). These are disordered states with strong quantum entanglement and exotic magnetic excitations. In our study, we will focus on a novel triangular lattice antiferromagnet PrTa7O19, a sister compound of the previously studied NdTa7O19, where such effects might take place. Our preliminary bulk magnetic characterizations don’t show any signature of magnetic ordering in this material. This calls for more sensitive local-probe magnetic investigations that could unambiguously confirm the spin-liquid ground state and characterize the corresponding magnetic excitations. A µSR study at sub-kelvin temperatures should provide a valuable insight and confirm the spin-liquid conjecture in this novel rare-earth based triangular lattice antiferromagnet.基于稀土元素的几何阻挫磁体，是探寻神秘莫测的量子自旋液体（quantum spin liquids, QSL）的极具前景的新方向。这类物质呈现出兼具强量子纠缠特性与新奇磁激发的无序态。本研究聚焦于一种新型三角晶格反铁磁体PrTa₇O₁₉，它是此前已被研究的NdTa₇O₁₉的同系姊妹化合物，这类量子自旋液体相关效应有望在其中显现。我们开展的初步块体磁特性表征未在该材料中观测到任何磁有序迹象，这表明亟需采用灵敏度更高的局域探针磁学表征手段，以明确无误地证实该体系的自旋液体基态，并对其对应的磁激发特性进行精准表征。在亚开尔文温度下开展的缪子自旋共振（µSR）测试，将为该新型稀土基三角晶格反铁磁体提供极具价值的研究视角，并验证其自旋液体猜想。

搜集汇总

背景与挑战

背景概述

该数据集包含在ISIS中子与μ子源EMU仪器上收集的实验数据，专注于研究三角晶格反铁磁体PrTa7O19中的自旋液体态。通过μSR技术在亚开尔文温度下进行探测，旨在确认该材料的量子自旋液体基态并表征其磁激发。数据发布于2024年，原始实验于2021年进行，采用RAW/Nexus格式存储。