Magnetic material based on rare earth Neodymium. It was in the nineteen seventies when the first magnetic materials based on rare earth became available to the industry.
The main raw material used for these magnets, the so-called rare earth, according to the periodic system of elements, belongs to the lanthanide series. This is the collective name
of the elements with atom numbers between 57 and 71, from lanthanum to lutetium. The atom numbers (Z) provide the number of protons (positively charged elementary particles) found in the atomic nucleus of the element in question. For magnetic materials an alloy of different elements is always used, the most important elements being Neodymium (Nd), Z 60 and Samarium (Sm), Z 62.