Abstract

A series of osmium double perovskite oxides, Ln 2LiOsO 6 ( Ln=La, Pr, Nd, Sm), has been prepared as single crystals from acidic molten hydroxide. All four oxides crystallize in the monoclinic space group P2 1/ n (Glazer tilt system #10, a − a − b + ), forming a 1:1 ordered rock salt lattice of Li + and Os 5+ cations. Magnetic susceptibility measurements show that these compounds are antiferromagnetic at low temperature with ordering temperatures of 39, 35, 23, and 32 K for Ln 2LiOsO 6 ( Ln=La, Pr, Nd, Sm), respectively.

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