ISSN:
1573-7357
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract We have measured the critical magnetic field for superconductivity in tungsten from 5.5 to 15 mK using a γ-ray anisotropy thermometer, and we have measured the heat capacity between 0.35 and 25 K. Analysis of the data givesH o =1.237 Oe for the 0 K critical field,T c =16.0 mK for the critical temperature, γ=1.008 mJ/mole · K 2 for the coefficient of the electronic heat capacity, and Θ o =383 K for the 0 K Debye temperature. The measured values of the critical fieldH c are consistently higher than those reported by Black, Johnson, and Wheatley (BJW) on the CMN temperature scale, but the temperature dependence is similar. This discrepancy and the temperature dependence ofH c suggest that both sets ofH c data are affected by magnetic impurities. Use of the calorimetric γ value permits an improved test of the CMN temperature scale with the very-low-temperatureH c data obtained by BJW.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00654953
