Why NdFeB Ring Magnets Are Essential in Smartphone Products Understanding NdFeB MagnetsComposition and StructureNdFeB magnets, short for neodymium-iron-boron magnets, are made from an alloy of three elements: neodymium (Nd), iron (Fe), and boron (B). This combination forms a unique crystal structure known as Nd2Fe14B, which is tetragonal.