Samarium Cobalt magnets 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. No magnet material should be employed as a structural element in a design, but Samarium Cobalt is especially prone to fracturing and is very weak under tensile or compressive loads. 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.