Accession Number:

AD0621705

Title:

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

Descriptive Note:

Technical rept.,

Corporate Author:

SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY RAPID CITY DEPT OF PHYSICS

Report Date:

1965-10-20

Pagination or Media Count:

18.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE