Resistivity of Antimony-Tin Single Crystals at Low Temperatures

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Abstract
The electrical resistivity of single crystals of pure antimony and alloys of antimony containing small amounts of tin has been determined in the temperature range from 300°K to 4.2°K. In all cases the crystals were orientated such that [111] was perpendicular to the electric field, and various amounts of tin up to about three atomic percent were employed. All the alloys showed normal metallic properties, i.e., the resistivity decreased as the temperature was lowered. However, the average temperature coefficient of resistance between 4.2°K and 77.3°K decreases sharply with increasing tin content and assumes a small constant value at three atomic percent tin. While the addition of tin at room temperature changes the resistivity only slightly, the effect at liquid helium temperature is very large. This "residual" resistivity is approximately a parabolic function of the tin concentration. Qualitative comparison of these results with the Bloch theory of metals is made.

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