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 contrast agents to enhance image clarity. Applied in hyperthermia treatment for cancer, where alternating magnetic fields generate heat to destroy tumor cells. Also utilized in bioseparation processes to isolate cells, proteins, or nucleic acids due to their ability to bind selectively and be easily separated with a magnet. Additionally, used in point-of-care testing for rapid disease diagnosis and in controlled release drug systems. Used in environmental remediation for the removal of contaminants from water through magnetic separation after adsorption.