Structure and physical properties of rare-earth zinc antimonides REZn{sub 1-} {sub x} Sb{sub 2} (RE=La, Ce, Pr, Nd, Sm, Gd, Tb)
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2 (Canada)
The ternary rare-earth zinc antimonides REZn{sub 1-} {sub x} Sb{sub 2} (RE=La, Ce, Pr, Nd, Sm, Gd, Tb) were prepared by heating at 1050 {sup o}C followed by annealing at 600 {sup o}C. For all members, single-crystal X-ray diffraction studies indicated that the Zn deficiency is essentially fixed, corresponding to the formula REZn{sub 0.6}Sb{sub 2}, with no appreciable homogeneity range. These compounds adopt the HfCuSi{sub 2}-type structure (Pearson symbol tP8, space group P4/nmm, Z=2). Single-crystal electrical resistivity measurements confirmed the occurrence of an abrupt resistivity decrease near 4 K for RE=Ce, and a less pronounced one for RE=La, Pr, and Gd. Except for the ferromagnetic Ce (T {sub c}=2.5 K) and antiferromagnetic Tb (T {sub N}=10 K) members, all remaining compounds exhibit no long-range magnetic ordering down to 2 K, instead showing temperature-independent (RE=La), van Vleck (RE=Sm), or Curie-Weiss paramagnetism (RE=Pr, Nd, Gd). - Graphical abstract: REZn{sub 1-} {sub x} Sb{sub 2} (HfCuSi{sub 2}-type) exhibits deficiencies in the tetrahedral Zn sites. Electrical and magnetic properties have been measured for different RE members.
- OSTI ID:
- 20900919
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 12; Other Information: DOI: 10.1016/j.jssc.2006.08.011; PII: S0022-4596(06)00467-1; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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