Magnetic Properties of Compound Fe-Ta-S

A novel compound Fe-Ta-S crystal has been obtained using iodine vapor transport technology. At low temperature this compound is in a strong diamagnetic state, which is similar to a superconductor. The dependence of the diamagnetic phase transition temperature on the magnetic field could be expressed as T_c = T_c0 + γH^2/5 due to a strong coupling between electrons and the magnetic field.