Samarium Cobalt magnet, also known as SmCo magnets, is mainly formed by metal Samarium, Cobalt, and Iron. As the first commercially viable rare earth permanent magnet, SmCo ring magnets are well known for superior resistance to temperature, oxidation, corrosion, and demagnetization. The most representative applications of SmCo ring magnets in SDM Magnetics include watch movement rotor magnets, optical isolator magnets, and turbo charger magnets.