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Licensed Unlicensed Requires Authentication Published by Oldenbourg Wissenschaftsverlag November 19, 2010

Synthesis, crystal structure, electrical and thermal transport properties of the skutterudite-derivative RhGe1.5–xSe1.5+x

Ying Liang, Walter Schnelle, Niels Oeschler, Serhij Budnyk and Yuri Grin

Abstract

The skutterudite-derivative phase RhGe1.5-xSe1.5+x has been synthesized and structurally characterized by metallography and powder X-ray diffraction data. At x = 0, RhGe1.5Se1.5 displays trigonal sym metry, space group R-3, with unit cell parameters a = 12.0601(8) Å, c = 14.826(1) Å, V = 1867.5(4) Å3, and Z = 24. The crystal structure can be viewed as a modification of the cubic structure of the skutterudite CoAs3, where Ge and Se anions order in layers perpendicular to the [111] direction of the cubic skutterudite unit cell. Electrical resistivity, Seebeck coefficient and thermal conductivity of the phase RhGe1.5–xSe1.5+x( p-type semiconductor) have been investigated for different x values in the temperature range from 3 to 640 K.


* Correspondence address: Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Deutschland,

Published Online: 2010-11-19
Published in Print: 2011-01

© by Oldenbourg Wissenschaftsverlag, Dresden, Germany