Regensburg 2000 – wissenschaftliches Programm

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M: Metallphysik

M 14: Postersitzung

M 14.23: Poster

Donnerstag, 30. März 2000, 15:00–19:00, C

Temperature dependence of transport properties of Al-Cu-Fe phases — •Carlos Landauro and Heinrich Solbrig — Institut für Physik, TU-Chemnitz, D-09107 Chemnitz, Germany.

The temperature dependence of transport coefficients is

theoretically examined for Al-Cu-Fe phases. We investigate

the electronic conductivity, the thermoelectric power, the

Hall resistance, the thermalconductivity, and the Lorenz

number. The spectral dependence of the resistivity is modeled

by means of Lorentz functions in accordance with results of

ab initio calculations (LMTO-ASA, Kubo-Greenwood formula).

This model extracts those properties from the ab initio

results which are indispensables to consistently explain

the transport coefficients mentioned above. The validities

of both the Matthiessen’s rules and the Wiedemann-Franz

law are analyzed.