Accession Number : AD0681284

Title :   HALL COEFFICIENTS OF CU, AG, AND AU IN THE RANGE 4.2-300 DEGREES K,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Alderson,J. E. A. ; Farrell,T. ; Hurd,C. M.

Report Date : 03 MAY 1968

Pagination or Media Count : 9

Abstract : The Hall coefficient R of high-purity polycrystalline group-IB metals and some single-crystal Cu samples has been determined with high precision in the approximate temperature range 4.2-300 degrees K and in a magnetic field of 15 kG. The general temperature dependence of R for each IB metal can be explained for temperatures down to about 50 degrees K in terms of what is known about the electronic relaxation times associated with different electron scattering processes. But at lower temperatures these data show a new behavior: The R-versus-temperature curce for each metal shows an apparent maximum centered at about 40 degrees K. Experiments are described which show this is not a sample-size effect, not an effect of trace impurities, but probably a result of a phonon-drag contribution to R. The work has involved similar measurements of some very dilute AgAu, AgZn, and AgCd alloys. (Author)

Descriptors :   (*HALL EFFECT, METALS), COPPER, SILVER, GOLD, PHONONS, CRYOGENICS, BAND THEORY OF SOLIDS, SINGLE CRYSTALS, CANADA

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE