Crystallographic and magnetic characteristics of TI(InS <sub>2</sub>) <sub>1-­x</sub>(FeSe <sub>2</sub>) <sub>x</sub> solid solutions
The structural and magnetic characteristics of the TI(InS <sub>2</sub>) <sub>1-­x</sub>(FeSe <sub>2</sub>) <sub>x</sub> crystals (0 ≤ x ≤ 0.015) are investigated. It's shown that a continuous series of solid solutions are formed in this system. It is found that the unit cell parameters of these compounds increase with increasing FeSe <sub>2</sub> concentrations. The abrupt change of the specific magnetization value is discovered on the temperature dependences of the Tl(InS <sub>2</sub>) <sub>0.995</sub>(FeSe <sub>2</sub>) <sub>0.005</sub> solid solution magnetization in the fields with strength of less than 1 T, that is probably associated with the canted magnetic structure formation below 115 K. The growth of the FeSe <sub>2</sub> concentration in the studied solid solutions leads to the formation of a superparamagnetic state in the diamagnetic matrix.