Interaction of heterogeneous thin films and phase formation in the Tl–Fe–S system

The processes of phase formation and phase transitions in Tl–Fe–S thin layers are investigated by the methods of high-energy electron diffraction and kinematic electronography using an EMR-102 electron diffractometer. It is established that compounds of the Tl–S and Fe–S systems are formed in amorphous and highly dispersed polycrystalline states, respectively. A ternary compound with the composition TlFeS$_2$ formed in the amorphous state crystallizes in the monoclinic lattice under heat treatment. Upon recrystallization of the polycrystalline films of monoclinic TlFeS$_2$, the monoclinic lattice of the TlFeS$_2$ secondary phase is formed.