Large Anomalous Hall Effect and Slow Relaxation of the Magnetization in Fe<sub>1/3</sub>TaS<sub>2</sub>
Sebastian Mangelsen, Julian Hansen, Péter Adler, Walter Schnelle, Wolfgang Bensch, S. Mankovsky, S. Polesya, H. Ebert
Abstract
Herein, we present an extensive study of the magnetic and magnetotransport properties of iron-inserted transition-metal dichalcogenide Fe1/3TaS2. High-quality single crystals were prepared by an improved protocol for chemical vapor transport. The crystals show a sharp ferromagnetic order transition at the Curie temperature TC = 38 K, a very high anisotropy field of 79 T, and slow relaxation of the magnetization below TC. The field-dependent Hall resistivity in the ferromagnetic regime does not follow the M(H) curves, which could be explained by the unusual large negative magnetoresistance that reaches values of up to −72% under a field of 9 T. The large temperature and field dependence of the Hall effect and magnetoresistance near the Curie temperature point to a strong interaction of the charge carriers with thermally induced fluctuations of the spins.