Samarium cobalt magnets (SmCo) are composed of samarium, cobalt and iron. These rare earth magnets are extremely strong for their small size and are the second-strongest type of permanent magnet made. Their max energy product is at least three times that of alnico 8 and at least five times that of ferrite. SmCo has higher temperature ratings and higher coercivity than neodymium. They are also highly corrosion resistant and do not require a coating.
Often referred to in the industry as SmCo Magnets.
- More expensive than other materials
- High Hc and Hci
- High Bhmax
- Can withstand high operating temperatures, up to 350°C.
- Powerful for size
- Corrosion resistant and do not require a coating
Samarium-Cobalt magnets are brittle, and prone to cracking and chipping. Allowing magnets to snap together will cause the magnets to shatter.
Samarium-Cobalt Price Sensitivity
Due to the Cobalt content used to manufacture these magnets, Samarium-Cobalt Magnets fluctuate in price more than other materials.
Samarium-Cobalt Magnet Applications Include
- Traveling wave tubes
- Computer rigid disc drives
- DC motors – when temperature stability is required
- Linear applications
- Various automotive applications
Grades of Samarium Cobalt:
SmCo18, SmCo20, SmCo22, SmCo24, SmCo26, SmCo28, SmCo30, SmCo32