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

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.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1966
Accession Number
AD0645738

Entities

People

  • Erik P. Harris

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Band Structures
  • Carbon Resistors
  • Critical Temperature
  • Crystal Structure
  • Department Of Defense
  • Energy Gaps
  • Fermi Levels
  • Free Electrons
  • Heat Energy
  • Latent Heat
  • Magnetic Fields
  • Magnetic Properties
  • Measurement
  • Pressure Measurement
  • Tensile Strength
  • Thermodynamic Properties
  • Thermodynamics

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene