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