Magnetic structure of the layered quasi-two-dimensional magnet NdSb2

The RSb2 (R = La-Nd, Sm) series consist of a layered, quasi-two-dimensional crystal structure, and show unusual behaviours such as heavy fermion superconductivity with a very large upper critical field in CeSb2, and the interplay of superconductivity, charge density wave order and band topology in LaSb2. NdSb2 is reported to be a high-mobility low-dimensional magnet with highly quasi-2D electronic and magnetic properties, and is proposed to be a candidate for high performance polarized photodetectors. Measurements of an anomalous Hall effect point to a 2D non-collinear spin arrangement in NdSb2, but direct probes of the magnetic structure are not reported. Here we propose to determine the magnetic structure of NdSb2 by performing neutron diffraction measurements of single crystals using SXD. These results will enable us to gain a microscopic understanding of the low dimensional magnetism of NdSb2, which may be important both for future device applications, and for revealing the mechanisms of diverse unusual magnetic properties in the RSb2 series including the anomalous Hall effect.

RSb₂（R=La-Nd, Sm）系列化合物具有层状准二维晶体结构，展现出诸多反常物性：例如CeSb₂中存在具有超大上临界场的重费米子超导性，LaSb₂中则存在超导性、电荷密度波序与能带拓扑之间的协同相互作用。NdSb₂被报道为一种高迁移率低维磁体，具备高度准二维的电子与磁学特性，被提议作为高性能偏振光电探测器的候选材料。反常霍尔效应的测量结果表明NdSb₂中存在二维非共线自旋排布，但目前尚未见关于其磁结构的直接表征报道。本研究拟通过单晶体中子衍射实验，借助SXD测定NdSb₂的磁结构。上述研究结果将帮助我们从微观层面理解NdSb₂的低维磁学性质，这既对其未来的器件应用具有重要意义，也有助于揭示RSb₂系列材料中包括反常霍尔效应在内的多种反常磁学物性的内在机制。

搜集汇总

背景与挑战

背景概述

该数据集关注层状准二维磁体NdSb2的磁性结构研究，通过中子衍射测量填补了该材料直接磁性结构数据的空白，旨在理解其低维磁特性并揭示异常霍尔效应等机制，为未来器件应用提供基础。数据采集于2024年12月9日，但公开访问需等到2027年12月13日。