Magnesium Ferrite (MgFe₂O₄) is one of the most important ferrites. The normal spinal type has a cubic structure and is a soft magnetic n-type semiconductor material.

Cancer treatment: MgFe₂O₄ nanoparticles can be used in magnetic hyperthermia therapy. This treatment method uses heat to kill cancer cells. The nanoparticles can target and destroy tumors by generating heat when a magnetic field is applied.
Transporting genetic material: MgFe₂O₄ nanoparticles can be used to transport genetic materials such as DNA and RNA into cells. This could be useful in areas such as gene therapy and vaccine development.
Antibacterial agents: MgFe₂O₄ nanoparticles can be used as antibiotic carriers to treat bacterial infections. This could help in the fight against bacteria that are resistant to conventional antibiotics.
Contrast agents: MgFe₂O₄ nanoparticles can be used as contrast agents in medical imaging techniques such as magnetic resonance imaging (MRI). This can enable doctors to better see organs and tissues in the body.
Accelerating chemical reactions: MgFe₂O₄ nanoparticles can be used to catalyze various chemical reactions. This can make manufacturing processes more efficient and environmentally friendly.
Cleaning technologies: MgFe₂O₄ nanoparticles can be used to remove pollutants from water and air. This can help reduce environmental pollution.
Magnetic sensors: MgFe₂O₄ nanoparticles can be used in sensors used to detect magnetic fields.