Growth of BaFe_(12)O_(19) thin films formed by reactive diffusion

摘要

Thin films of BaFe_(12)O_(19) have been grown on (00 J) oriented α-Fe_2O_3 single crystal substrates. The initial stages of the reaction between BaFe_2O_4 thin films and hematite single crystals have been investigated using AFM and SEM. The microstructure studies showed that (00 J) oriented BaFe_(12)O_(19) microcrystallites formed during annealing at 900-1100℃. It was concluded that the surface diffusion had a dominating role in formation of thin BaFe_(12)O_(19) films. Crystal growth was performed by stacking of layers with the thickness 2.3 nm, correlated with the c-parameter of the BaFe_(12)O_(19) unit cell.