Crystal Growth, Structural Transitions, and Magnetic Properties of the Fluorite-Related Osmates: Sm3OsO7, Eu3OsO7, and Gd3OsO7Inorganic Chemistry
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AbstractThe Ln3OsO7 (Ln = Sm, Eu, Gd) compounds were grown as single crystals from molten hydroxide fluxes. At temperatures above 235, 330, and 430 K, respectively, the Ln3OsO7 (Ln = Sm, Eu, Gd) compounds exist in the orthorhombic space group Cmcm. When they are cooled below these temperatures, the compounds undergo a structural phase transition from space group Cmcm to P21nb. The structure transition results in a loss of lattice centering, a doubling of the b axis, a distortion of the vertex-shared Os−O chains, and a reduction in the coordination of one of the rare earth cations from 8-fold to 7-fold. Sm3OsO7 and Eu3OsO7 exhibit complex magnetic behavior below about 50 K, and Gd3OsO7 shows a ferromagnetic-like order at 34 K in applied fields of less than 10 kG.
Copyright OwnerAmerican Chemical Society
Citation InformationWilliam R. Gemmill, Mark D. Smith, Yurij Mozharivskyj, Gordon J. Miller, et al.. "Crystal Growth, Structural Transitions, and Magnetic Properties of the Fluorite-Related Osmates: Sm3OsO7, Eu3OsO7, and Gd3OsO7" Inorganic Chemistry Vol. 44 Iss. 20 (2005) p. 7047 - 7055
Available at: http://works.bepress.com/gordon-miller/28/