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Influence of hydrogen on the thermoelectric power of palladium alloyed with neighbouring elements: I. Pd/Ru/H and Pd/Rh/H alloys

A W Szafranski

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Pd/Ru and Pd/Rh alloys have been loaded with hydrogen in high-pressure conditions. The resulting hydrogen contents were close to the stoichiometric composition, H/(Pd + Me) = 1. Lower hydrogen contents have been obtained by successive partial desorptions. The thermoelectric power and electrical resistance of one- and two-phase alloys have been measured simultaneously in the temperature range between 80 and 300 K. A Nordheim–Gorter type correlation of the two quantities has been observed in many cases and the partial thermopowers corresponding to electron–phonon scattering and lattice disorder could be determined. The observed anomalous behaviour of the total and partial thermopowers is attributed to virtual bound states of ruthenium or rhodium.


PACS

72.15.Jf Thermoelectric and thermomagnetic effects

68.43.Mn Adsorption kinetics

62.50.-p High-pressure effects in solids and liquids

63.20.K- Phonon interactions

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Condensed matter: structural, mechanical & thermal

Dates

Issue 21 (4 June 2003)

Received 3 January 2003

Published 19 May 2003



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