Synthesis, structure, and magnetic properties of Sr2NiOsO6 and Ca2NiOsO6: two new osmium-containing double perovskites |
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| Authors: | Macquart René Kim Seung-Joo Gemmill William R Stalick Judith K Lee Yongjae Vogt Tom zur Loye Hans-Conrad |
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| Affiliation: | Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. |
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| 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. |
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