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Ferroelectric Behaviors in Semiconductive Cd1-xZnxTe Crystals

XAFS studies as well as dielectric and X-ray diffraction studies of II-VI semiconductive ternary alloys Cd1-xZnxTe with x=0.0, 0.05, 0.1, 0.2, 0.3, 0.7 and 1.0 were carried out in the temperature range of 10K to 600K. Ferroelectric phase transitions occurred in the mixed crystals with 0.0<x<1.0. Note that in CdTe (x=0.0) and ZnTe (x=1.0) the phase transition does not occur. An anomaly of the structural phase transition was found in the X-ray diffraction studies, however the local structure determined from the XAFS studies was independent of temperature down to 20K.