Senbeto Kena Etana. Effect of Holmium (III) Ion-Doped Nickel-Copper Ferrite Nanoparticle on Structural, Optical, and Dielectric Properties. STAR [Internet]. 2025 Dec. 31 [cited 2026 Jan. 10];14(4):142-5. Available from: https://journals.wgu.edu.et/index.php/star/article/view/1959