Ferrites

thumb|upright=1.2|Magnetite is one of the very few minerals that is ferrimagnetic; it is attracted by a [[magnet as shown here]] thumb|Unit cell of magnetite. The gray spheres are oxygen, green are divalent iron, blue are trivalent iron. Also shown are an iron atom in an octahedral space (light blue) and another in a tetrahedral space (gray). Magnetite is a mineral and one of the main iron ores, with the chemical formula . It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. With the exception of extremel

passive component (choke) that suppresses high frequency noise in electronic circuits

chemical compound

magnet made of ferrite material