THERMAL CONDUCTIVITY OF PURE AND IMPURE INDIUM ANTIMONIDE AT LOW TEMPERATURES.
Abstract
The thermal conductivity of pure and impure InSb was measured in the temperature range 77-300K. The samples were placed between two Armco-iron standards. Copper-constantan thermocouples were attached to the standard-sample-standard combination to monitor temperatures at various points of the sandwich. To increase confidence in the data, the 77-300K range was covered twice for each sample. Computer-assisted data processing was used to reduce the possibility of human error. The thermal conductivity of both samples decreased with increasing temperatures. Values of 1480 mW/cm deg K AT *)K and 174 mW/cm deg K at 303K were determined for the thermal conductivity of the pure InSb sample. Values of 370 mW/cm deg K at 79K and 77 mW/cm deg K at 302K were determined for the thermal conductivity of the impure InSb sample. The thermal conductivity plot for the impure InSb sample was fitted with a theoretical curve calculated on the basis of Holland's modification of the Callaway analysis. The model included boundary scattering, impurity scattering, and phonon-phonon scattering. The magnitude of the electron-phonon scattering term was estimated. Impurity and possibly electron-phonon scattering can be held responsible for the lower thermal conductivity of the impure sample. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1966
- Accession Number
- AD0640993
Entities
People
- Emery J. Stephans
Organizations
- South Dakota School of Mines and Technology