A HIGH PRECISION SYSTEM FOR MEASURING SEEBECK COEFFICIENT, ELECTRICAL RESISTIVITY, AND HALL COEFFICIENT IN INHOMOGENEOUS THERMOELECTRIC MATERIALS,

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Abstract:

This report presents a discussion of problems encountered and solutions developed during the design, construction, and testing of an apparatus for making high-precision measurements of Seebeck coefficient, S, electrical resistivity, alpha, and Hall coefficient, R, in single samples of a number of inhomogeneous, compound semiconductors, over the temperature range from 77 K to ca 500 K. The final design, which is described in detail, was tested for precision under the condition that samples were removed from and remounted in the apparatus between measurements. Under this condition, the variations in remeasuring S and alpha for eleven materials were found to be not larger than 5. A detailed analysis of the data observed for an Alumel sample is presented. Also under this condition, the variation in remeasuring R for one sample of single-crystal bismuth telluride was found to be not larger than 5. A detailed analysis of the data observed for an Alumel sample is presented. Also under this condition, the variation in remeasuring R for one sample of single-crystal bismuth telluride was found to be not larger than 2. These data also are presented. Author

Author(s):
Winslow, John W. ; Hart, Ronald R. ; Boteler, John C.
Author Organization(s):
NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA
Annotation:
A high precision system for measuring Seebeck coefficient, electrical resistivity and Hall coefficient in inhomogeneous thermoelectric materials.
Pagination:
0044

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
USNRDL-TR-850
Task Number(s):
10254
Project Number(s):
SR007 11 01
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ELECTRICAL RESISTANCE, *HALL EFFECT, *SEMICONDUCTORS, THERMOELECTRICITY, THERMOELECTRICITY, MEASUREMENT, TEST EQUIPMENT, SINGLE CRYSTALS, BISMUTH ALLOYS, TELLURIUM ALLOYS, INTERMETALLIC COMPOUNDS
Keyword(s):
HALL COEFFICIENT, SEEBECK COEFFICIENT
Report Date:
1965 Jul 20