STRUCTURE AND PROPERTIES OF THE LOW DIMENSIONAL-LAYERED MATERIAL PRCUXTE2
Roy N. McDougald Jr.1, Jess Evans2, Julia Chan1, Robin Macaluso2.
1The University of Texas at Dallas, Richardson, TX, 2University of Northern Colorado, Greeley, CO.
The aim of this project is to understand the role of praseodymium-based low dimensional-layered materials on the magnetic and electrical properties. The ternary tellurides PrCuxTe2 (x = 0.38 and 0.43) have been synthesized in 2 steps: reaction of the elements with a soak at a temperature of 1,228 K, then reheated to 1,228 K in KI flux. The PrCuxTe2 compounds are isostructural to LaCu0.40Te2 and crystallize in the space group Pbcm (No. 62) of the orthorhombic crystal system, with cell dimensions of a = 7.6505(11) Ã…, b = 8.4449(11) Ã…, c = 6.2206(10) Ã… for PrCu0.38Te2, and a = 7.6480(14) Ã…, b = 8.4410(14) Ã…, c = 6.2320(15) Ã… for PrCu0.43Te2. The crystal structure consists of PrTe8 bicapped trigonal prisms, while each copper atom is surrounded by 4 tellurium atoms. The tellurium atoms form infinite chains along the c-axis, with Te-Te interactions of 3.11 Ã…. These Te-Te interactions are highly dependent on the concentration of copper, and the physical properties of our materials will be compared to other rare-earth analogues. We will present the synthesis, structural characterization, and preliminary properties of PrCu0.38Te2 and PrCu0.43Te2.