We report here the observation of robust thermoremanent magnetization (TRM) in Fe-intercalated TaS2 single crystal FexTaS2, which develops upon cooling under a moderate magnetic field of 500 Oe or higher. The thermoremanence is found to exist in a zero magnetic field up to a temperature as high as 160 K, which is well above the ferromagnetic Curie point (TC= 90 K) of the sample. The TRM in this compound can be traced back to the strong Ising character and the quasi-two-dimensional nature of the spins. The analysis of the magnetization data indicates the presence of short-range magnetic correlation in the form of a Griffiths singularity above TC to a temperature as high as 2TC. The TRM is further manifested in the form of a large anomalous Hall effect (AHE) in zero magnetic field. In contrast to TRM, which exists well above TC, the thermoremanent Hall effect vanishes as soon as the sample is heated above TC. This may be an indication that a long-range ordered phase is essential for the emergence of AHE.
@article{arxiv.2501.17453,
title = {Magnetic Metastability driven Anomalous Hall Effect in Fe$_{x}$TaS$_2$},
author = {Mohamad Numan and Prasanta Chowdhury and Sanat Adhikary and Saurav Giri and Jhuma Sannigrahi and Matthias Gutmann and Souvik Chatterjee and Subham Majumdar},
journal= {arXiv preprint arXiv:2501.17453},
year = {2025}
}