Physical properties of the complex metallic alloy phases in the Al–Pd–Mn system

Dolinšek, J.; Jagličić, Zvonko; Smontara, Ana

doi:10.1080/14786430500306519

Cited by 2 publications

(1 citation statement)

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“…5, where the e ͑T͒ contribution derived from Eq. ͑34͒ ͑solid line͒ is compared with that obtained from the expression e Ј͑T͒ = T exp ͑T͒L th ͑T͒ ͑circles͒, where exp ͑T͒ are experimental data 42 and L th ͑T͒ has been derived from Eq. ͑35͒.…”

Section: ͑26͒mentioning

confidence: 99%

Thermal conductivity in complex metallic alloys: Beyond Wiedemann-Franz law

Maciá

2009

Phys. Rev. B

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In this work we consider the range of validity of the Wiedemann-Franz law ͑WFL͒ in quasicrystals, approximant phases, and giant unit-cell complex metallic alloys. In the limit of very low temperatures the WFL is satisfied, as expected, but as the temperature is progressively increased the Lorenz function deviates from the ideal behavior L͑T͒ / L 0 = 1. Whereas the quasicrystalline sample exhibits a systematic and significant deviation for all considered temperatures, the other samples show the existence of a characteristic temperature signaling the onset of the anomalous behavior. This characteristic temperature is directly related to the unit-cell density of the sample and progressively takes on larger values as this density decreases. An alternative route to derive the lattice contribution to the thermal conductivity based on a simultaneous fitting analysis of the electrical conductivity ͑T͒ and thermoelectric-power S͑T͒ experimental transport curves is proposed. The capabilities of this approach are illustrated by studying the temperature dependence of the lattice contribution to the thermal conductivity in the Ј-AlPdMn giant unit-cell phase.

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Section: ͑26͒mentioning

confidence: 99%