SPECIFIC HEAT OF ALUMINUM NEAR ITS SUPERCONDUCTIVE TRANSITION POINT

Abstract

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 6/10,000 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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1962
Accession Number
AD0293874

Entities

People

  • David C. Rorer
  • Horst Meyer
  • Robert C. Richardson

Organizations

  • Duke University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aluminum
  • Carbon Resistors
  • Crystals
  • Equations
  • Heat Energy
  • Latent Heat
  • Low Temperature
  • Magnetic Fields
  • Magnetic Properties
  • Measurement
  • Military Research
  • Resistance
  • Single Crystals
  • Specific Heat
  • Thermodynamic Properties
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Regression Analysis.
  • Superconducting Magnet Technology