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Samarium Cobalt rare-earth (SmCo) magnets are manufactured by using powder metallurgy techniques which offer the best value when comparing performance and size in high temperature or adverse environments. They are higher in cost, but magnetically very strong and typically allow for dimensional reductions. They offer excellent corrosion resistance and typically do not require a surface treatment. Samarium Cobalt has good resistance to external demagnetizing fields because of its high Intrinsic Coercive Force (Hci). This resistance makes Samarium Cobalt magnets an excellent choice for electromechanical applications.