Samarium Cobalt: 

(SmCo) magnets are of the Rare Earth class and have been available since the early 1970s.  These magnets possess very high magnetic properties, and excellent thermal stability while remaining resistant to corrosion.  These characteristics make SmCo magnets ideal for applications requiring resistance to wide-ranging temperatures and environments.  SmCo magnets are manufactured by sintering or compression bonding.  They are anisotropic and can only be magnetised in the direction of orientation.  In general, magnetising fields of approximately 30 to 45KOe are required to saturate SmCo magnets.

Features of Sintered SmCo

  • The best temperature characteristics in the rare-earth magnet family
  • Manufactured by powder metallurgical process involving the sintering of powder under vacuum.
  • Both grades of SmCo5 and Sm2Co17, commonly referred to as 1:5 and 2:17 material are available.
  • Good corrosion resistance and no special surface treatment required excellent for compact designs where high working temperature is a major concern. Grinding and slicing operations are possible

Application: applied to various electric motors, instruments, sensors, detectors, radar, and other high-tech equipment.

Attributes of Samarium Cobalt Material

  • High resistance to demagnetization
  • High energy (magnetic strength is strong for its size)
  • Good temperature stability
  • Expensive material (cobalt is market price sensitive)

Magnetic property parameters of Sintered Smco5

Note: Curie temperature and temperature coefficient are for reference only.

Magnetic property parameters of Sintered Sm2co17