Exploring the impact of nickel doping on the structure and low-temperature magnetic features of cobalt nano-spinel ferrite

Abstract Tailoring the magnetic features of cobalt ferrite nanoparticles (NPs) has been achieved via varying doping percent nickel. The nickel-substituted NPs Ni x Co 1-x Fe 2 O 4 (0 ? 1.0) are constructed by eco-friendly coprecipitation method. formation a nearly cubic single-phase spinel frame is assured analysis XRD data. Moreover, Rietveld based on structure refinement implemented in this study to precisely determine microstructural parameters and estimate cation distribution. A linear drop-in lattice constant with boosting 2+ ion acclaimed, regard Vegard's law. creation that spherical along polyhedron shape have diameter (about 39–45 nm) affirmed utilizing high-resolution transmission electron microscopy (HRTEM). Also, crystalline essence formed declared selective area diffraction (SAED). properties collected from hysteresis loops FC–ZFC curves. These curves tweaked as function low-temperature 5 K up 300 existence an external field (± 70KOe). magnetization revealed CoFe correspond hard ferrimagnetic material, whereas NiFe matched well identical soft material. divergence betwixt theoretical experimental values moment explained model "Random Canting Spins, (RCS)". In addition, remarkable reduction found recorded increasing content decreasing temperature towards K. findings imply potential ions enhancing for vast applications.