Abstract
A perovskite compound La 2MnRuO 6 was synthesized and the detailed crystal structure has been determined by Rietveld analysis of powder X-ray diffraction data. The nonstoichiometric range of La 2MnRuO 6+ x phase was determined from x=−0.015 to +0.152. The lattice constants with the orthorhombic space group Pnma (No 62) decrease with increase of oxygen nonstoichiometry from a=0.56921(8), b=0.78354(3) and c=0.55513(7) nm near stoichiometric composition to a=0.55594(2), b=0.78309(3) and c=0.55484(2) nm for hyperstoichiometric composition. The oxygen octahedron is almost regular and tilts each other in zigzag way by several degrees. The magnetic measurements of this phase showed a spin glass like behavior with a characteristic peak phenomenon below 100 K in the susceptibility–temperature curve ( χ– T) at low temperature.
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