Accession Number:

AD0645738

Title:

CRITICAL FIELD OF SUPERCONDUCTING ALUMINUM AS A FUNCTION OF TEMPERATURE AND PRESSURE ABOVE 0.3Deg. K

Descriptive Note:

Technical rept.

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF PHYSICS

Personal Author(s):

Report Date:

1966-11-01

Pagination or Media Count:

112.0

Abstract:

The critical field curve of aluminum was measured from T sub c to 0. 3K, at pressures ranging from 0 to 7200 psi. Using calorimetrically derived values for the low-temperature superconducting electronic specific heat, the data were extrapolated to T O, yielding values for H sub o and gamma. These values and experimental results for T sub c 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.

Subject Categories:

  • Metallurgy and Metallography
  • Electricity and Magnetism
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE