MAGNETIC-FIELD DEPENDENCE OF THERMAL CONDUCTIVITY MEASURED BY A CORBINO-DISK METHOD.

Abstract

When heat flow due to charged carriers is radial in a thin cylindrical sample, a magnetic field applied parallel to the cylinder axis has maximum effect in reducing the thermal conductivity K because this Corbino-disk geometry prevents formation of a transverse temperature gradient. When a magnetic field is applied the method measures directly isothermal K; longitudinal-flow methods are likely to give approximately the adiabatic K. Measurements were made in the range 70-250C on n-InSb with fields 1000-8000 gauss. Maximum total change in K was -4%, somewhat smaller in magnitude than expected. The discrepancy may be due to lower electron mobility and to the difference in the directions of heat flow and sample growth. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 20, 1965
Accession Number
AD0621705

Entities

People

  • David L. Burdick
  • R. Daniel Redin
  • Robert G. Morris

Organizations

  • South Dakota School of Mines and Technology

Tags

DTIC Thesaurus Topics

  • Conductivity
  • Electron Mobility
  • Electrons
  • Heat Transmission
  • Magnetic Fields
  • Mobility
  • Temperature Gradients
  • Thermal Conductivity

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics