Magnetic properties of Fe-doped 2H-TaS2

FexTaS2 (x = 0.25, 0.33, and 0.4) was prepared by using a solid state reaction method. The crystallographic structure and magnetic properties of the prepared compounds were investigated by using X-ray diffraction, superconducting quantum interference device magnetometer, and a Moessbauer spectrometer. The crystal structure of FexTaS2 (x = 0.25, 0.33, and 0.4) was found to be hexagonal with space group P6322. The lattice constants a0 and c0 increase with increasing Fe concentration. The magnetization and the coercivity also increase with increasing Fe concentration. The magnetic transition temperatures of FexTaS2 (x = 0.25, 0.33, and 0.4) were found to be 89, 150 and 47 K, respectively. The Curie-Weiss temperatures of FexTaS2 (x = 0.25, 0.33, and 0.4) were found to be 80, 37, and -82 K, respectively. The isomer shift value of Fe0.33TaS2 at 300 K was 0.68 mm/s relative to the Fe metal, which is consistent with the Fe2+ valence state. The Debye temperature of Fe0.33TaS2 was determined to be ΘD = 486 K.