Used in biomedical applications such as targeted drug delivery, where the magnetic properties allow guidance to specific sites in the body using external magnetic fields. Commonly employed in magnetic resonance imaging (MRI) as a contrast agent to enhance image clarity. Applied in hyperthermia treatment for cancer, where alternating magnetic fields generate heat to destroy tumor cells. Also utilized in biosensors and for magnetic separation of cells or biomolecules in diagnostic procedures. In environmental technology, helps in water purification by removing contaminants through magnetic separation after adsorption.