Experimental and theoretical investigations of the role of (Co–Ti) in the modification of the functional properties of nanocrystalline Ni–Zn ferritesK. E. Rady, E. M. Farag, K. M. El-Shokrofy and R. A. ElsadEur. Phys. J. Plus, 137 1 (2022) 109DOI: https://doi.org/10.1140/epjp/s13360-021-02314-x