IMPROVEMENT OF QUALITY OF CD1-XMNXTE CRYSTALS BY SPECIAL ANNEALING

Electrical, magnetic and optical properties of Cd1 - xMnxTe (0.1 less than or equal to x less than or equal to 0.45) single crystals grown b y the Bridgman technique and annealed under various conditions were in vestigated. The nonstabilities of electrical properties of as-grown si ngle crystals were revealed, caused by intrinsic (V-Cd', V-Cd'' and ex trinsic defects which were able to create low-binding-energy complexes . Heat treatment followed by slow cooling to 723 K (v = 1 K/h) under c onditions preventing sample evaporation stabilizes the electrical prop erties of the material. (C) 1998 Elsevier Science B.V. All rights rese rved.