Short range spin ice type correlations of DyAgGe by diffuse neutron scattering

Spin ices are exotic phases of matter characterized by frustrated spins obeying local “ice rules” that minimize the number of spatially isolated magnetic monopoles, in analogy with the electric dipoles in water ice. In two dimensions, one can similarly define ice rules for in-plane Ising-like spins arranged on a kagome lattice, leading to a variety of unique orders and excitations. Based on neutron results, HoAgGe is the first compound to realize the kagome spin ice state. We grow DyAgGe single crystal and investigate its magnetic property. Different from Ho spins in the ab plane, Dy spins are lying between c axis and ab plane below 15K. We have determined the magnetic structures of DyAgGe at 13.5K, with ab plane component of ordered moments forming anticlockwise hexagons, similar as HoAgGe case. We plan to do diffuse scattering to detect short range spin ice type correlations at 20K.自旋冰（spin ice）是一类奇异的物相，其特征为存在阻挫自旋，并遵循局域“冰规则（ice rule）”——该规则与水冰中的电偶极子（electric dipole）类似，可最小化空间孤立磁单极子（magnetic monopole）的数量。在二维体系中，同样可为排布于笼目晶格（kagome lattice）上的面内类伊辛自旋（Ising-like spin）定义冰规则，由此衍生出一系列独特的序态与激发模式。基于中子散射实验结果，HoAgGe是首个实现笼目自旋冰态的化合物。我们生长了DyAgGe单晶并对其磁性质展开研究。与Ho自旋位于ab平面内不同，在15K以下时，Dy自旋处于c轴与ab平面之间。我们已确定DyAgGe在13.5K下的磁结构：有序磁矩的ab平面分量形成逆时针六边形排布，这与HoAgGe的情况类似。我们计划在20K下开展漫散射实验，以探测短程自旋冰型关联。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于DyAgGe单晶的短程自旋冰型关联研究，通过漫散射中子散射实验在ISIS设施的SXD仪器上收集数据，旨在探索其磁性性质和自旋结构。数据采集于2021年4月29日，并于2024年5月1日公开发布，采用RAW/Nexus格式，涉及自旋冰规则在kagome晶格中的应用和Dy自旋的独特取向。