Year: 2025
Type: article
Abstract: Antiferromagnets Co1/3MS2 (M = Nb, Ta) have attracted great interest recently due to their large spontaneous Hall resistivity, attributed to the topological Hall effect (THE). In this work, we successfully manipulate the magnetic structures to tune THE by replacing Co with Fe in Co1/3NbS2 single crystals, i.e., (FexCo1−x)1/3NbS2. The evolution of the crystal lattice parameter c caused by the increase in Fe-doping levels is consistent with the change in composition. With increasing x, the main magnetic transition temperature gradually increases from 23.5 to 31.5 K. Enhanced topological Hall resistivity (∼3.04 µΩ cm at 2 K under zero field), meta-magnetic transition, and butterfly-shaped magnetoresistance are observed in the x = 0.12 single crystal. The x = 0.18 single crystal shows similar behaviors to the x = 0.12 sample, but a shrinkage of the topological Hall resistivity. While in x = 0.40 single crystal, THE disappears as magnetization changes from weak ferromagnetism in x = 0.12 and 0.18 to antiferromagnetism along the c axis, and instead, a field-induced hysteresis and topological Hall effect are observed. Our work provides a promising route to tune the THE by manipulating the spin orientation.
Source: APL Materials
DOI: 10.1063/5.0285776
Authors: Peng Zhu, Xin Zhang, Liu Yang, Yuqi Zhang, Deng Hu, Fuhong Chen, Haoyu Qi, Geyu Ye, Ting-Yui Wong, Yanqing Feng, Fangxin Zou, Zhiwei Wang
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,200
Awards: G3550235517, G3592830065, G3884879969
OpenAlex ID: W4413164294