Structural tuning interlinking various optical, dielectric and magnetic trends in annealed Mn0.5Zn0.5Fe2O4 spinel ferrites nanostructures

Mn0.5Zn0.5Fe2O4 nanoparticles have been synthesized through co-precipitation technique and annealed up to 700 degrees C. The values of crystallite size and lattice constant ranges from 11 to 21 nm and 8.4550 to 8.4732 angstrom respectively for most prominent peak (3 1 1) with a switching at 400 degrees C. X-ray density ranges from 5.18 to 5.25 g/cm3, lattice strain decreases with the increase of annealing temperature and ranges from (10.39-5.55) x 10-3 which in turn affects the line defects to decrease with annealing temperature (8.18-2.33) x 1015 lines/m2. The high values of specific surface area emphasize on energy storage applications like in supercapacitor. Magnetic properties including magnetic moment (nB = 0.0967-3.441 mu B), saturation magnetization (Ms = 2.2906-81.4769 emu/g), coercivity (Hc = 24.80-109.35 Oe), anisotropic field (Hk = 49.00-198.38 Oe) and magneto-crystalline anisotropy (K1 = 87.22-4570.59 erg/g) manifested overall improved magnetic trends. The value of exchange bias field has been observed up to 108.18 Oe. The higher values of band-gaps (2.45-2.62 eV and 2.22-2.46 eV) lead to prospective solar cell applications. The range of metallization criterion [0.49-0.42] along with high refractive index values (3-9.6) suggest that synthesized nanomaterial could be utilized for the new generation of nonlinear optical materials and hetero-laser applications. Nyquist/Cole-Cole plots confirm the non-Debye type relaxation process and their shape leads to the existence of multiple electrical responses in the prepared samples.4.