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Eu(10)Mn(6)Sb(13): A new ternary rare-earth transition-metal

Title
Eu(10)Mn(6)Sb(13): A new ternary rare-earth transition-metal
Authors
Holm, APPark, SMCondron, CLOlmstead, MMKim, HKlavins, PGrandjean, FHermann, RPLong, GJKanatzidis, MGKauzlarich, SMKim, SJ
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2003
Journal Title
INORGANIC CHEMISTRY
ISSN
0020-1669JCR Link
Citation
vol. 42, no. 15, pp. 4660 - 4667
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A new transition-metal-containing Zintl compound, Eu(10)Mn(6)Sb(13), was prepared by a high-temperature Sn-flux synthesis. The structure was determined by single-crystal X-ray diffraction. Eu(10)Mn(6)Sb(13) crystallizes in the monoclinic space group C2/m with a = 15.1791(6) Angstrom, b = 19.1919(7) Angstrom, c = 12.2679(4) Angstrom, beta = 108.078(1)degrees, Z = 4 (R1 = 0.0410, wR2 = 0.0920), and T = 90(2) K. The structure of Eu(10)Mn(6)Sb(13) is composed of double layers of Mn-centered tetrahedra separated by Eu(2+) cations. The double layers are composed of edge- and corner-sharing Mn-centered tetrahedra which form cavities occupied by Eu(2+) cations and [Sb(2)](4-) dumbbells. Linear [Sb(3)](5-) trimers bridging two tetrahedra across the cavity are also present. Bulk susceptibility data indicate paramagnetic behavior with a ferromagnetic component present below 60 K. Temperature-dependent electrical resistivity measurements show semiconducting behavior above 60 K (E(a) = 0.115(2) eV), a large and unusually sharp maximum in the resistivity at similar to40 K, and metallic behavior below 40 K. (151)Eu Mossbauer spectra confirm that the europium is divalent with an average isomer shift of -11.2(1) mm/s at 100 K; the spectra obtained below 40 K reveal magnetic ordering of six of the seven europium sublattices and, at 4.2 K, complete ordering of the seven europium sublattices.
DOI
10.1021/ic034054w
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자연과학대학 > 화학·나노과학전공 > Journal papers
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