METHOD FOR SYNTHESIS OF MONOCRYSTALLINE TETRAGONAL IRON TELLURIDES AND IRON TELLURIDES DOPED WITH SULPHUR AND/OR SELENIUM Russian patent published in 2015 - IPC C30B9/12 C30B29/46 C01B19/04 

FIELD: chemistry.

SUBSTANCE: method for synthesis of tetragonal iron tellurides and iron tellurides doped with silver and/or sulphur includes placing a mixture of tellurium, selenium, sulphur and iron at one end of a sealed ampoule, filling the ampoule with a mixture of a eutectic composition of different combinations of sodium, potassium, rubidium and caesium chlorides, heating the ampoule with a temperature gradient from a temperature of 600-790°C at the side where the mixture is located to a temperature which is 30-100°C lower at the opposite side, during a time which enables to transfer the mixture to the opposite end of the ampoule.

EFFECT: invention enables to obtain large monocrystals of FeTe, including FeTe doped with selenium or sulphur, which are promising superconductors, without violating the integrity of the structure with low synthesis temperature.

1 dwg, 4 ex