Calculated low-field Hall coefficient of Ag/sub x/Pd/sub 1-x/ alloys
Alloy energy bands and electron lifetimes were calculated for Ag/sub x/Pd/sub 1-x/ alloys by using a charge self-consistent version of the Korringa-Kohn-Rostoker coherent-potential approximation. These results were used to calculate the low-field Hall coefficient as a function of concentration. The calculated Hall coefficients are in good agreement with experiment. Some commonly used approximations for the Hall coefficient are found to be inapplicable to Ag/sub x/Pd/sub 1-x/ alloys. In particular the Hall coefficient is not simply related to the number of carriers, nor is the Hall coefficient independent of the electron lifetime. Instead, the Hall coefficient is strongly enhanced by the anisotropy of the lifetime in the palladium-rich alloys. At higher temperatures the Hall coefficient of the palladium-rich alloys decreases because electron-phonon scattering makes the electron lifetime more isotropic.
- Research Organization:
- Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- OSTI ID:
- 6827624
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 29:8; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANISOTROPY
BAND THEORY
BOLTZMANN EQUATION
DIFFERENTIAL EQUATIONS
ELECTRON-PHONON COUPLING
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
HALL EFFECT
LEPTONS
LIFETIME
PALLADIUM ALLOYS
PARTIAL DIFFERENTIAL EQUATIONS
PLATINUM METAL ALLOYS
QUANTITY RATIO
SILVER ALLOYS