Abstract
Pb0.8Sn0.2Te single crystals are equilibrated with (Pb0.8Sn0.2)x Cd1−x alloys of various compositions at 700 and 800 °C and quenched to room temperature. Cd solubility and Hall-effect measurements as a function of the activity of Cd have led to the development of a defect model for Cd-doped Pb0.8Sn0.2Te according to which most of the Cd is present as neutral CdxPb, a small fraction being present as positively charged Cdi compensated by negatively charged vacancies of Pb, V′Pb. The model can also be used to predict the behavior of Cd-doped Pb0.8Sn0.2Te in Cd-rich atmospheres and Te-rich atmospheres.
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