Ibrahim UM, Maikudi S, Musa A, Mohammed J, Ahmed F. Band-gap, Urbach’s energy tail and Magnetic Analysis of Cs3+-Ni2+ Doped Zinc Spinel Ferrites Nanoparticles. NJP. 2025;34(2):218-224. doi:10.62292/10.62292/njp.v34i2.2025.444