“…Among the observed modes, the characteristic peaks observed at 476 cm À1 (T 2g ), 571 cm À1 (T 2g ) and 693 cm À1 (A 1g ) are assigned for the CFO, respectively. The obtained Raman bands are similar to earlier reported data based on CFO spinel [22]. However, the obvious shift can be observed, which is attributed to the difference between ceramics and thin films.…”