Lorenz Number for High-Purity Copper

15 September 1960

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 119 (6) , 1869-1871
https://doi.org/10.1103/physrev.119.1869

Abstract

Following a recent report that the Lorenz number,

L = \frac{λ}{σ T}

, does not approximate to the theoretical value of

2.45 \times 10^{- 8} W

ohm

\deg^{- 2}

for very pure copper at the lowest temperatures, measurements have been made of thermal and electrical conductivities on copper of similar purity. Between 2 and 4°K, values of

L

are observed lying in the range

{2.5}_{4}

{2.4}_{0} \times 10^{- 8} W

ohm

\deg^{- 2}

Keywords

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