Thermoelectric properties and antiferromagnetism of the new ternary transition metal telluride CrAuTe4

摘要

The new ternary transition metal telluride CrAuTe4 has been discovered through solid-state reaction of the elements. The crystal structure is solved in the monoclinic space group P2/m (No. 10) with lattice parameters a = 5.4774(7) Angstrom, b = 4.0169(6) Angstrom, c = 7.3692(13) Angstrom, and beta = 90.604(10)degrees. The structure is related to that of the binary compound AuTe2, and a derivation of the structure of CrAuTe4 from AuTe2 is shown. Measurements of the thermopower, thermal conductivity, electrical resistivity, and magnetic susceptibility are presented. The compound undergoes a paramagnetic to antiferromagnetic transition at 255 K. (C) 2004 Elsevier Inc. All rights reserved.