Facile Synthesis and Characterization of BaFe₁₂O₁₉ Nanoparticles with Different Morphologies

The BaFe₁₂O₁₉ nanoparticles with different morphologies including plates, lamella, and rods have been prepared from a facile thermal pyrolysis of citrate precursors obtained from a spray-drying process. The additives and thermal history affect the morphology of BaFe₁₂O₁₉ nanopartilces. The lattice parameter values vary with the particle morphology especially for lattice parameter c, and the value is 23.235, 23.187, and 23.344 Å corresponding to lamella, nanorod, and plate, respectively. The coercivity value of the lamella, nanrod, and plate is 4579, 3115, and 3974 Oe.

Keywords:

• Chemical synthesis
• magnetic materials
• magnetic properties
• oxides

We gratefully acknowledge financial support from the National Natural Science Foundation of China (No. 50506020 and No. 50706033), and the National High Technology Research and Development Program of China (No. 2006AA11A1B3).

Notes

∗The heating rate before 450°C was 0.5°C/min.