The Editor-in-Chief is issuing an editorial expression of concern regarding the article . While the article presents novel information regarding chemical co-precipitation-based synthesis and characterization, the Editor-in-Chief is concerned regarding the amount of overlap with the articles [2, 3]. None of the authors have responded to any correspondence from the editor or publisher about this overlap or the Editorial Expression of Concern.
A. Lassoued, M.S. Lassoued, F. Karolak et al., Synthesis, structural, optical, morphological and magnetic characterization of copper substituted nickel ferrite (CuxNi1−xFe2O4) through co-precipitation method. J. Mater. Sci. 28, 18480–18488 (2017). https://doi.org/10.1007/s10854-017-7795-4
A. Lassoued, B. Dkhil, A. Gadri et al., Control of the shape and size of iron oxide (a-Fe2O3) nanoparticles synthesized through the chemical precipitation method. Results Phys. 7, 3007–3015 (2017). https://doi.org/10.1016/j.rinp.2017.07.066
A. Lassoued, M.S. Lassoued, B. Dkhil et al., Synthesis, structural, optical and morphological characterization of hematite through the precipitation method: effect of varying the nature of the base. J. Mol. Struct. 1141, 99–106 (2017). https://doi.org/10.1016/j.molstruc.2017.03.077
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Lassoued, A., Lassoued, M.S., Karolak, F. et al. Expression of Concern: Synthesis, structural, optical, morphological and magnetic characterization of copper substituted nickel ferrite (CuxNi1−xFe2O4) through co-precipitation method. J Mater Sci: Mater Electron 32, 2650 (2021). https://doi.org/10.1007/s10854-020-03459-8