Synthesis and Characterization of LaNi(0.5)Ti(0.5)O(3) and La(2)NiTiO(6) Double Perovskite Nanoparticles

In the present work, LaNi(0.5)Ti(0.5)O(3) and La(2)NiTiO(6) nanoparticles were synthesized by the modified Pechini method. LaNi(0.5)Ti(0.5)O(3) was calcined at 1073 K for 17 h or 100 h, while La(2)NiTiO(6) was calcined at 1273 K for 135 h. The double perovskite calcined at 1073 K for 17 h presented orthorhombic symmetry with Pbnm space group, mean particle size was 31.9 ± 1 nm, random ordering of Ni(2+) and Ti(4+) cations, Néel temperature close to 15 K, and magnetic moment of 1.29 [Formula: see text]. By increasing the calcination time, this material showed the same symmetry and space group, a mean particle size of 50.7 ± 2 nm, short-range ordering of Ni(2+) and Ti(4+) cations, Néel temperature around 12 K, and magnetic moment of 0.96 [Formula: see text]. La(2)NiTiO(6) presented a monoclinic crystal structure, with P2(1)/n space group, mean particle size of 80.0 ± 5 nm, rock salt ordering of Ni(2+) and Ti(4+), Néel temperature of approximately 23 K, and magnetic moment of 2.75 [Formula: see text].