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Single crystal ingots of alloys have been grown using the Bridgman technique. A study of the crystal perfection revealed that in most cases the bulk of each ingot consists of a highly perfect single crystal with no detectable grain boundaries. In addition, the "as‐grown" material is highly homogeneous in both alloy composition and carrier concentration, and is free from metal precipitates. A simplified isothermal annealing technique has been used to obtain various carrier concentrations in alloy samples with , and 0.21. The carrier concentration in these alloys, equilibrated at the liquid + solid/solid solution boundary, has been determined for several annealing temperatures.
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Dionne et al. (1972) studied this question.
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