Synthesis, structural characterization, and two-dimensional antiferromagnetic ordering for the oxides Ti 3(1− x) Ni xSb 2 xO 6 (1.0 ≥ x ≥ 0.6)

Abstract

A new family of mixed oxides of general formula Ti 3(1− x) Ni x Sb 2 x O 6 for 1.0 ≥ x ≥ 0.6 has been synthesized, by solid state reaction in air, and the crystallographic data for these oxides have been determined. The structures of these compounds are related to the rutile or trirutile type structure. Magnetic susceptibility measurements, between 4.2 and 300 K, show the existence of a broad maximum centered at about 35 K for the NiSb 2O 6 oxide which has been fitted by using the high temperature series expansion method (HTSE) and the estimated value of the exchange integral is −7 K. This bidimensional antiferromagnetic ordering is drastically lowered when the x value increases for the different doped phases in the system Ti 3(1− x) Ni x Sb 2 x O 6.