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 biosensing and separation processes, including magnetic bead-based isolation of DNA, RNA, and proteins. Industrial applications include wastewater treatment for removing contaminants via magnetic separation. Stable in various environments, making them suitable for coatings and catalysts in chemical reactions.