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Synthesis, Structure, and Magnetic Properties of Sr<sub>2</sub>NiOsO<sub>6</sub> and Ca<sub>2</sub>NiOsO<sub>6</sub>:  Two New Osmium-Containing Double Perovskites

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Citations

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References

2005

Year

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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