The recent emergence of two-dimensional (2D) van der Waals ferromagnets has provided a new platform for exploring magnetism in the flatland and for designing 2D ferromagnet-based spintronics devices. Despite intensive studies, the anomalous Hall effect (AHE) mechanisms in 2D van der Waals ferromagnets have not been investigated yet. In this paper, we report the AHE mechanisms in quasi-2D van der Waals ferromagnet Fe0.29TaS2 via systematically measuring Fe0.29TaS2 devices with thickness from 14 nm to bulk single crystal. The AHE mechanisms are investigated via the scaling relationship between the anomalous Hall and channel conductivities. As the Fe0.29TaS2 thickness decreases, the major AHE mechanism changes from extrinsic scattering to intrinsic contribution. The crossover of the AHE mechanisms is found to be highly associated with the channel conductivities as the Fe0.29TaS2 thickness varies.
@article{arxiv.1908.09280,
title = {Anomalous Hall effect mechanisms in quasi-2D van der Waals ferromagnet Fe0.29TaS2},
author = {Ranran Cai and Wenyu Xing and Huibin Zhou and Boning Li and Yangyang Chen and Yunyan Yao and Yang Ma and X. C. Xie and Shuang Jia and Wei Han},
journal= {arXiv preprint arXiv:1908.09280},
year = {2019}
}
Comments
Main paper: 20 pages, 6 figures. Supplementary materials: 10 figures