Abstract
Hall-effect and solubility measurements are carried out on Cd-doped PbTe crystals equilibrated with (Pb,Cd) alloys of various compositions at T=700 and 800 °C and quenched to room temperature. In Pb-saturated conditions, while most of the Cd is found to be incorporated as neutral Cd on Pb sites CdxPb, a fraction of the total amount of Cd is present as positively charged interstitial species Cdi compensated by electrons. A complete defect model which can predict the behavior of Cd-doped PbTe in Cd-rich atmospheres as well as in Te-rich atmospheres is proposed.
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