OICC Press International Nano Letters 2228-5326 12 4 (December 2022) 2022 02 25 A review on structural and magnetic properties of magnesium ferrite nanoparticles 10.1007/s40089-022-00368-y EN R. Sagayaraj PG & Research Department of Physics, St. Joseph’s College of Arts and Science (Autonomous), Cuddalore, Tamil Nadu, 607001, IN Journal Article 2022 02 25 Abstract The microstructural properties and magnetic signature of magnesium ferrite nanoparticles are discussed in this review. The main purpose of the analysis is to focus on different synthesis methods, change in pH (hydrogen potential), change in annealing temperature (calcinations temperature: 400–1000 °C), change in dopant concentration and change in surfactant (PVP, PVA and PEG). pH values (9–11) are essential for obtaining fine nanoparticles and for adjusting the positively charged surface of the absorbent material. Also, more attraction to complex negatively charged ions. Magnetic signatures of magnetic materials are classified using annealing temperature. The structural and magnetic parameters were most affected by the annealing temperature. In composite materials of magnetic signature tuned by surfactant, non-magnetic clouds separate the magnetic fields. The surfactant primarily induces a decrease in concentration magnetization ( M s ) and residual magnetization ( M r ). The change in pH, annealing temperature, surfactant change and dopant concentration in magnesium ferrite compounds cause charge imbalance. Therefore, oxygen vacancies are created to increase the dopant levels and annealing temperature. Most of the magnesium ferrite research articles support superparamagnetism.