Figure 6
From: Atomic scale insights on the growth of BiFeO3 nanoparticles
Variation of Mӧssbauer results corresponding mainly to Fe atoms associated with BiFeO3 with respect to calcination temperature. Based on the Mossbauer results the stages (I) and (II) are understood to be due to nucleation, growth and the formation of nanocrystalites of BiFeO3 respectively. While stage III implies the coarsening of nanocrystallites of BiFeO3 in to polycrystalline phase. Mossbauer study brings out that the importance of the stage II leading to the formation of nanocrytallites of BiFeO3 in large fraction close to 0.8 along with the elucidation of the evolution of hyperfine parameters such as hyperfine field with calcination temperature in this intervalmarking an increase in crysallite size.
