Used in biomedical applications such as targeted drug delivery, where the nanoparticles are guided 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 heat the nanoparticles to destroy tumor cells. Utilized in bioseparation processes to isolate cells, proteins, or nucleic acids through magnetic separation techniques. Also used in environmental remediation for the removal of pollutants and heavy metals from water via magnetic adsorption.