|
|||||
|
|
Structure and magnetic properties of RE2CuIn3 (RE=Ce, Pr, Nd, Sm and Gd) |
|
| Authors: | Yuriy B Tyvanchuk Ute Ch Rodewald Rainer Pöttgen |
| Institution: | a Faculty of Chemistry, Ivan Franko National University of Lviv, Kyryla and Mephodiya Street 6, 79005 Lviv, Ukraine b Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland c Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany |
| Abstract: | The ternary copper indides RE2CuIn3≡RECu0.5In1.5 (RE=Ce, Pr, Nd, Sm and Gd) were synthesized from the elements in sealed tantalum tubes in an induction furnace. They crystallize with the CaIn2-type structure, space group P63/mmc, with a statistical occupancy of copper and indium on the tetrahedral substructure. These indides show homogeneity ranges RECuxIn2−x. Single crystal structure refinements were performed for five crystals: CeCu0.66In1.34 (a=479.90(7) pm, c=768.12(15) pm), PrCu0.52In1.48 (a=480.23(7) pm, c=759.23(15) pm), NdCu0.53In1.47 (a=477.51(7) pm, c=756.37(15) pm), SmCu0.46In1.54 (a=475.31(7) pm, c=744.77(15) pm), and GdCu0.33In1.67 (a=474.19(7), c=737.67(15) pm). Temperature-dependent susceptibility measurements show antiferromagnetic ordering at TN=4.7 K for Pr2CuIn3 and Nd2CuIn3 and 15 K for Sm2CuIn3. Fitting of the susceptibility data of the samarium compound revealed an energy gap ΔE=39.7(7) K between the ground and the first excited levels. |
| Keywords: | Indium Intermetallics Crystal chemistry Magnetism |
| 本文献已被 ScienceDirect 等数据库收录！ | |