title: Synthesis, structure, and magnetic properties of Sr2NiOsO6 and Ca2NiOsO6: two new osmium-containing double perovskites.
abstract: Two new double perovskite oxides, Ca(2)NiOsO(6) and Sr(2)NiOsO(6), have been prepared as polycrystalline powders by solid state synthesis. The two oxides were structurally characterized by variable-temperature powder neutron diffraction. Ca(2)NiOsO(6) was found to adopt a monoclinic structure (P2(1)/n), while Sr(2)NiOsO(6) was found to be tetragonal (I4/m). Magnetic susceptibility measurements indicate that Ca(2)NiOsO(6) orders in a canted antiferromagnetic state at about 175 K while Sr(2)NiOsO(6) orders antiferromagnetically at about 50 K.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
authors.forename: René
authors.initials: R
authors.lastname: Macquart
authors.forename: Seung-Joo
authors.initials: SJ
authors.lastname: Kim
authors.forename: William R
authors.initials: WR
authors.lastname: Gemmill
authors.forename: Judith K
authors.initials: JK
authors.lastname: Stalick
authors.forename: Yongjae
authors.initials: Y
authors.lastname: Lee
authors.forename: Tom
authors.initials: T
authors.lastname: Vogt
authors.forename: Hans-Conrad
authors.initials: HC
authors.lastname: zur Loye