ISSN:
1434-6036
Schlagwort(e):
PACS. 74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) – 72.15.Jf Thermoelectric and thermomagnetic effects – 74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract: We report measurements of the resistivity, ρ, and the Seebeck coefficient, S , of a MgB2 sintered sample, and compare S with theoretical calculations based on precise electronic structure calculations. ρ is fitted well by a generalized Bloch-Grüneisen equation with a Debye temperature Θ R of 1050 K. S is given by the sum of a diffusive and a phonon drag term and the behavior in the temperature region T c 〈 T 〈 0.1Θ R follows the relationship AT+BT3. The phonon drag term indicates a strong electron-phonon interaction. The diffusive term, compared with calculations, suggests that σ bands give the main contribution to the Seebeck effect.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1140/epjb/e20020050
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