Corrigendum to “Influence of Tm–Tb substitution on magnetic and optical properties of Ba–Sr hexaferrites prepared by ultrasonic assisted citrate sol-gel approach” Mater. Chem. Phys. 253 (2020) 123324 (Materials Chemistry and Physics (2020) 253, (S0254058420306945), (10.1016/j.matchemphys.2020.123324))

The authors regret to notify that there is an error in Fig. 3 in the original published version of the article (https://doi.org/10.1016/j.matchemphys.2020.123324) as one SEM image (3rd image in Fig. 3) was unintentionally duplicated with another SEM image (last SEM image in Fig. 2 in https://doi.org/10.3390/nano10020272) due to the close general compositions. Fortunately, this unintended mistake had no influence on any other results.[Figure presented] The authors would like to apologise for any inconvenience caused.