SmCo permanent magnet 180/120

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Permanent magnets have become indispensable in today’s technology-focused world. The many different magnetic materials and their manifold characteristics have firmly established permanent magnets as important elements in countless application fields. In addition to the proven materials ferrite and AlNiCo, modern magnets are also made from rare earth materials such as neodymium-iron-boron and samarium-cobalt. Even small magnets made from these materials offer strong magnetic force and thereby cater to the growing demand for smaller and stronger magnets. Permanent magnets also play a key role in the growing field of automation technology, where it is essential to continue the development of drives, actuators and sensors. A particular leap in the direction of future technologies was the discovery of the new materials samarium-cobalt and neodymium-iron-boron. SmCo magnets consist of samarium (Sm) and cobalt (Co). With respect to the two possible alloy compositions, a distinction is made between Sm1Co5 and Sm2Co17, also referred to as 1/5 alloy and 2/17 alloy. These materials are part of the group of rare earth materials, and permanent magnets made from them offer a high temperature stability and corrosion resistance, a low temperature coefficient and a very high coercive field strength. This makes samarium-cobalt (SmCo) an extremely versatile but expensive all-round material. Magnets made from samarium-cobalt alloys are used in applications that require very strong magnetic fields in extreme temperatures.