Synthesis, Crystal Structure and Magnetic Properties of a New Ruthenium(V) Oxide: La_1.2Sr_2.7RuO_7+δ.

Abstract

Structure D 2000 Synthesis, Crystal Structure and Magnetic Properties of a New Ruthenium(V) Oxide: La1.2Sr2.7RuO7+δ. -The title compound is synthesized by solid state reaction of SrCO3, La2O3, and RuO2 (1250°C, 36 h). The samples are characterized by powder XRD, XANES, TGA, and magnetic measurements. La1.2Sr2.7RuO7+δ crystallizes in the trigonal space group R3m. The structure consists of uniform stacking of two AO3 layers and one A 2 O 1+δ layer (A: La/Sr). The A cations in the A 2 O 1+δ layer are trigonal-prismatically coordinated and the Ru ions occupy the octahedral sites between the AO3 layers. -(GOETZFRIED*, T.; RELLER, A.; EBBINGHAUS, S. G.; Solid State Sci. 6