SPECIFIC HEAT OF ALUMINUM NEAR ITS SUPERCONDUCTIVE TRANSITION POINT
DUKE UNIV DURHAM NC
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We have carried out specific heat measurements with a high temperature-resolution in different magnetic fields on three specimens of aluminum. These measurements gave the difference of the specific heat between the superconductive and the normal state, the latent heat and the critical field curve. For a reversible transition, these three quantities are related by thermodynamic equations and hence it is possible to check their consistency. For one sample, this consistency was within experimental error for the two other samples, there was some disagreement between the critical curve as measured and as calculated. The shape of the transition in zero field has been investigated in detail and it was found that the phase change could take place within about 610,000 K for one sample, while for the two others it was spread over two millidegrees. From the width we have estimated the correlation range using Pippards theory.
- Inorganic Chemistry
- Electricity and Magnetism