Synthesis and characterization of Gd³⁺ ion-doped Mn–Zn ferrite nanoparticles

A. Kumar^{1, 2} - M. S. Yadav²

¹ Department of Physics, DCR University of Sci.\;&\;Tech., Murthal, Sonepat-131039, Haryana, India
² Department of Physics, Kurukshetra University Kurukshetra-136119, Haryana, India

Abstract
Gd³⁺ ion-doped Mn_0.5Zn_0.5Gd_xFe_2−xO₄ (x = 0.1, 0.2, 0.3, 0.4) mixed ferrite samples were prepared using the chemical co-precipitation method. The structural parameters like crystallite size, lattice parameter and strain induced have been calculated. The lattice parameter increases with the increase in Gd³⁺ ion concentration and shows a non-linear behavior. EPR was used to evaluate the resonance peak intensity; Lande’s splitting factor (g-value), peak-to-peak line width (∆H_p−p), spin concentration (N_s) and the relaxation time (τ_s). Magnetic parameters such as saturation magnetization (M_s), remanence (M_r) and coercivity (H_c) were measured by a search coil method. The value of saturation magnetization increases from 29.94 emu/gm for x = 0.1 to 46.01 emu/gm for x = 0.4. It is found that the magnetic properties are in accordance with the structural properties. Tables 1, Figs 4, Refs 6.