Ferrites are iron-based oxide materials used to produce magnetic components. Ferrites are made in two varieties - ferromagnetic (which means they become magnetized when exposed to an external magnetic field) and antiferromagnetic (which means they remain non-magnetized in the presence of an external magnetic field). These materials are commonly used in electronics and electrical engineering as inductors, transformers, filters, and other components. Ferrites are also used in various other applications such as microwaves and magnetic shielding. Common ferrite ceramic materials are MnZn and NiZn ferrites.