Crystal Defects and Cation Redistribution Study on Nanocrystalline Cobalt-Ferri-Chromites by Positron Annihilation Spectroscopy

Figure 2

Transmission electron micrographs of CoCr_xFe_2−xO₄ system for (a) 𝑥=0.0, (b) 1.0, and (c) 1.6 compositions. The insets show the enlarged images of grains in each case.

(a)

(b)

(c)