Abstract
Recent theoretical work suggests that magnesium and lithium should be superconducting in the m°K temperature range. We have cooled samples of each of these metals to a temperature of 4 m°K, measured by a gamma-ray anisotropy thermometer. Although the magnetic field was less than 10−2 Oe, no superconducting transitions were observed. The use of a nuclear orientation thermometer employing60Co in single crystal (hcp) cobalt is described.
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Work supported in part by the U.S. Atomic Energy Commission, and in part by ARPA, U.S. Department of Defense.
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Thorp, T.L., Triplett, B.B., Brewer, W.D. et al. Search for superconductivity in lithium and magnesium. J Low Temp Phys 3, 589–602 (1970). https://doi.org/10.1007/BF00628336
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DOI: https://doi.org/10.1007/BF00628336