1 Correction to: Applied Physics A (2021) 127:579 https://doi.org/10.1007/s00339-021-04707-2

In this article the  incorrect figure appeared as Fig. 3; Fig. 3 should have appeared as shown below. Moreover, the chemical formula for copper (II) fluoride as mentioned in the original article is CuF2, not CuF. The original article has been corrected.

Fig. 3
figure 3

SEM images of (Cu0.5Tl0.5)-1223 superconductor phase with (CuF2)x and (TlF)y substitutions for: a x = y = 0.0, b x = 0.2, c x = 0.4, d y = 0.1 and e y = 0.4