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The pseudo-binary alloys (PbTe) 1-x -(SnTe) x in the whole composition range were prepared by pressureless sintering. It was found that the electrical conductivities increased with mole fraction x (x=<0.6), and then decreased. A transition from extrinsic to intrinsic state for the carriers occurred while temperature was elevated to 573 K. The temperature, corresponding...
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