This work investigates SrxZn₁₋ₓFe₂O₄ nanoparticles synthesized via chemical co-precipitation to understand how strontium (Sr) doping modifies their structural, optical, dielectric, and charge-transport properties.
🔬 Major Scientific Contributions:
• XRD confirms single-phase cubic spinel, with peak shifts revealing Sr-induced lattice expansion
• FESEM shows uniform nanoscale grains
• Raman & FTIR analysis detects metal–oxygen vibrational changes → local structural distortion
• UV–Vis spectroscopy shows red-shifted absorption and reduced bandgap (2.62 ± 0.1 eV)
• AC conductivity & modulus studies demonstrate improved charge transport and relaxation
• Impedance spectroscopy reveals decreased dielectric loss (tan δ) at high frequencies
• Mössbauer spectroscopy identifies Fe²⁺ redistribution between tetrahedral and octahedral sites
🎯 Applications:
• High-frequency electronics
• Optoelectronic devices
• Energy-storage materials
• Ferrite-based tunable components
This study establishes a structure–cation engineering approach for designing next-generation ferrite nanomaterials.