Neodymium Iron Boron magnets are a type of rare earth alloy that typically has two atoms of Neodymium (Nd), 14 atoms of Iron (Fe), and one atom of Boron (B) as the primary elements. It has chemical composition of Nd2Fe14B. There are some other elements that are also used for purposes of increasing the coercivity, gaining lower oxidation characteristics and other such desirable characteristics. These elements are used to 'dope' the alloy, and are generally found in small quantities. These magnets are mechanically strong, gives the best fields possible in permanent. The temperature coefficient of Br is higher than Samarium Cobalt, so the material is more sensitive to temperature changes, ranging from 0.10%/°C - 0.13%/°C.