Abstract
The temperature dependences of the electronic conductivity and the thermoelectric power are theoretically examined for the i-Al-Cu-Fe (1/1) approximant in comparison with both crystalline ω-Al7Cu2Fe and amorphous Al84Fe16. Our study is based on ab initio results for the spectral curves which are obtained by means of the linear muffin-tin orbitals (LMTO) method and the Kubo-Greenwood formula. Thermopowers are calculated after the Mott formula. We show that a realistic variety of thermopower curves versus temperature results from small shifts of the Fermi energy in a narrow resistivity peak. A simple model of the energy-dependent resistivity is suggested which supports the interpretation of the thermopower curves.
Original language | English |
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Pages (from-to) | 600-603 |
Number of pages | 4 |
Journal | Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing |
Volume | 294-296 |
DOIs | |
State | Published - 15 Dec 2000 |
Externally published | Yes |
Bibliographical note
Funding Information:The work is supported by the “Deutsche Forschungsgemeinschaft”.