Critical field of superconducting aluminum as a function of pressure and temperature above 0.3°K

The critical field curve of aluminum has been measured from T to 0.30 K, at pressures ranging from 0 to 7200 psi. Using caloric metrically derived values for the low-temperature superconducting electronic specific heat, the data have been extrapolated to T 0, yielding values for Ho and gamma These values and experimental results for Tc are then used to calculate the superconducting electronic entropy and the deviation of the critical field curve from parabolicity over the entire temperature range. The results show excellent agreement with previous calorimetric measurements of the thermodynamic properties of superconducting aluminum. The shape of the reduced critical field curve shows no pressure dependence over the range of pressures used. The dependence of Ho, Tc, and gamma on pressure are in fair agreement with previous work by Gross and Olsen.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Harris, Erik Preston

Contributors dc:contributor

• Mapother, D.E.

• critical field
• superconducting aluminum
• low-temperature superconducting electronic specific heat
• calorimeter

Statement dc:rights

• 1967 Erik Preston Harris

Language dc:language

en

Identifier

6091189

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25687