Samarium Cobalt Magnets

Samarium cobalt magnets are one of the most useful rare earth magnets for high temperature applications. They retain most of their energy up to 575° F, making them ideal replacements for Alnico magnets when high temperature use or miniaturization is required.

Rare Earth magnet
Extremely strong – currently up to 32 MGOe
Less susceptible to oxidation and more brittle than Neodymium
Withstands high temperature environments – up to 300°C
More expensive than Neodymium

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Custom Assemblies Made From Samarium Cobalt Rare Earth Magnets and Assemblies

Samarium cobalt (SmCo) magnets are rare earth magnets that offer high maximum energy products and can operate in high temperature environments. They are extremely strong and typically allow for smaller size magnet profiles. Though not as strong as neodymium magnets, samarium cobalt magnets present three significant advantages. They work over a wider temperature range, have superior temperature coefficients, and have a greater resistance to corrosion. Special coatings are available for specific marine and automotive applications.

Benefits of Samarium Cobalt Magnets

SmCo Magnets are ideal for corrosive environments

Since samarium cobalt offers excellent corrosion resistance, these magnets typically do not require a surface treatment. They also have good resistance to external demagnetizing fields because of their high intrinsic coercive force (Hci). This resistance makes samarium cobalt rare earth magnets an excellent choice for demanding motor applications. They are available in three grades up to 32 MGOe.

SmCo operate at higher temperatures

Samarium cobalt magnets are one of the most useful magnets for high temperature applications. They retain most of their energy up to 575° F, making them ideal replacements for Alnico magnets when high temperature use or miniaturization is required. Samarium cobalt magnets are known for their excellent temperature stability—maximum use temperatures are between 250 and 550°F; Curie temperatures range from 700 to 800°F.