The low-field galvanomagnetic transport coefficients of cubic metals: General formulae and experiments on the hall coefficient in Al(Ge)

We report systematic calculations of the low-temperature diffusion thermopower of Al-based dilute alloys with 3d and 4sp impurities, by solving self-consistently the linearized Boltzmann equation. The impurity scattering is described by the phase shifts obtained from self-consistent local-density-functional impurity-in-jellium calculations. Moreover, the influence of the full anisotropy of the Al Fermi surface on the scattering process is taken into account within the on-Fermi-sphere approximation. Our results explain successfully the experimentally measured variations in the thermoelectric power, except for Mn impurities. In this case, the presence of a narrow many-body resonance at the Fermi level in the localized spin-fluctuations regime seems to be responsible for the large negative value of thermopower observed.

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Low-field galvanomagnetic properties of aluminium-based dilute alloys

Mavropoulos¹,

Stéfanou²

1997

J. Phys.: Condens. Matter

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We report a systematic study of low-field galvanomagnetic properties of aluminium-based dilute alloys with 3d and 4sp impurities. The low-field magnetoresistivity tensor is determined by exactly solving the linearized Boltzmann equation for the anisotropic vector mean free path, without using any adjustable parameter. Our method of calculation is based on the on-Fermi-sphere approximation which allows us to combine the full anisotropy of the host Fermi surface, obtained by the four-orthogonal-plane-wave method, with the impurity scattering phase shifts, evaluated by self-consistent local-density-functional impurity-in-jellium calculations. Our results for the Hall coefficient and the magnetoresistance are in good agreement with the experimental data.

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The low-field galvanomagnetic transport coefficients of cubic metals: General formulae and experiments on the hall coefficient in Al(Ge)

Cited by 6 publications

References 26 publications

Magnetoresistance measurements in Al-Ge alloys after neutron irradiation at 4.6 K

Magnetoresistance measurements in Al-Ge alloys after neutron irradiation at 4.6 K

Low-temperature thermopower of Al-based dilute alloys

Low-field galvanomagnetic properties of aluminium-based dilute alloys

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