Synthesis, crystal structure and physical properties of Ce2Ru2Ga3
2013; Elsevier BV; Volume: 38; Linguagem: Inglês
10.1016/j.intermet.2013.02.002
ISSN1879-0216
AutoresЕ. В. Мурашова, Ksenia Shablinskaya, Zhanaphija Kurenbaeva, Alexander Yaroslavtsev, А. П. Менушенков, Roman Chernikov, O. V. Grishina, Sergey Nesterenko, Yurii Seropegin, D. Kaczorowski,
Tópico(s)Magnetic Properties of Alloys
ResumoThe novel compound Ce2Ru2Ga3 was synthesized by arc-melting the elemental constituents in argon atmosphere followed by long-term annealing at 873 K. It forms in an orthorhombic system, with a crystal structure of new type (space group P212121, Z = 4, oP28) and the lattice parameters: a = 4.488(2) Å, b = 6.912(4) Å, c = 17.092(9) Å. The gallide is structurally related to intermetallics crystallizing with the NdRh2Sn4-type structure or its derivatives. It represents an unique family of materials with abnormally short Ce–Ru distances, which usually exhibit some instability of the valence state of cerium atoms. Based on the low-temperature magnetic and electrical transport data, as well as the X-ray absorption data, Ce2Ru2Ga3 has been characterised as another intermediate valence system.
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