The measurements of the magnetic susceptibility, magnetization, electrical resistivity and magnetoresistance have been performed for the Fe intercalated compound Fe0.5TiS2. According to X-ray diffraction measurements the Fe0.5TiS2 compound synthesized in the present work has a monoclinic crystal structure (space group I12/m1) which results from the ordering of Fe ions and vacancies between S-Ti-S tri-layres. The changes in the heat-treatment conditions at temperatures below 1100 Celsius degrees do not lead to an order-disorder transition within the subsystem of intercalated Fe ions. It has been shown that this compound exhibits an antiferromagnetic (AF) ground state below the Neel temperature TN = 140 K. Application of the magnetic field at T < TN induces a metamagnetic phase transition to the ferromagnetic (F) state, which is accompanied by the large magnetoresistance effect (up to 27 %). The field-induced AF-F transition is found to be irreversible below ~ 100 K. The magnetization reversal in the metastable F state at low temperatures is accompanied by substantial hysteresis (~ 100 kOe) which is associated with the Ising character of Fe ions.
@article{arxiv.1205.3242,
title = {Field-induced high coercive ferromagnetic state and magnetoresistance in the antiferromagnetically ordered compound Fe0.5TiS2},
author = {N. V. Baranov and E. M. Sherokalova and A. S. Volegov and A. V. Proshkin and N. V. Selezneva and E. P. Proskurina},
journal= {arXiv preprint arXiv:1205.3242},
year = {2012}
}