CALORIMETRIC MEASUREMENT OF NEGATIVE SURFACE ENERGY IN SUPERCONDUCTORS OF THE SECOND KIND.

Abstract

The experimental details of this study are covered in the Ph.D. Thesis of Robert R. Riche entitled: 'A Calorimetric Study of the Effects of Surface Energy in a type II Superconductor.' The entropy of the mixed state of type II superconductors has been investigated experimentally. The results have been interpreted in terms of the interaction of quantized fluxoids (near H sub c1) or solutions of the Ginsburg-Landau equations (near H sub c2) instead of the negative surface energy model of the original proposal. One of the experimental methods used was a direct calorimetric measurement of the head added to hold the sample at a constant temperature as the magnetic induction was increased. An accurate technique for determining the thermodynamic critical field for an irreversible sample was also a contribution of this work. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0680919

Entities

People

  • Don C. Hopkins

Organizations

  • Missouri University of Science and Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Energy
  • Equations
  • Magnetic Induction
  • Measurement
  • Superconductors
  • Surface Energy

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology
  • Theoretical Analysis.