Samarium cobalt block magnets (also known as smco magnet): one of the two types of rare earth magnets is a strong permanent magnet made of an alloy of samarium and cobalt. They were developed in
the early 1970s. They are generally the second-strongest type of magnet made, less strong than neodymium magnets, but have higher temperature ratings. They are expensive, brittle, and prone to
cracking and chipping. Samarium-cobalt magnets have maximum energy products (BHmax) that range from 16 megagauss-oersteds (MGOe) to 32 MGOe; their theoretical limit is 34 MGOe. They are available
in two ''series'', namely Series 1:5 and Series 2:17.
Samarium cobalt rare earth magnets Features & Characteristics
Samarium Cobalt Magnets (SmCo) magnets feature excellent temperature stability while retaining their magnetic properties under extreme temperature conditions. Thus, they are very suitable for
applications involving high or extremely low temperatures.
SmCo magnets have high coercivity (Hci) to resist demagnetization.
Samarium cobalt ring magnet have good corrosion resistance. Sm1Co5 does not rust because it does not contain iron. However, Sm2Co17 should be coated with a protective coating in very wet conditions
to minimize the risk of surface corrosion. However, Sm1Co5 does not rust because it does not contain iron.
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