SmCo Magnets – Samarium Cobalt Magnets
- Manufactured using powder metallurgy processes from SmCo₅ or Sm₂Co₁₇ alloys
- High resistance to demagnetization
- Excellent corrosion resistance
- Outstanding temperature stability
- Relatively expensive due to limited raw material availability
- Brittle and extremely hard
Typical Physical Properties
| Curie Temperature (°C) | 700-800 |
| Maximum Operating Temperature (°C) | 250 for SmCo5, 350 for Sm2Co17 |
| Resistivity (µ ohm.cm) | 50-90 |
| Hardness (Hv) | 450-600 |
| Density (g/cm3) | 8.0-8.5 |
| Relative Recoil Permeability (µrec) | 1.10 |
| Saturation Field Strength, kOe (kA/m) | 37.5 (3000) |
| Temperature Coefficient of Br (%/°C) | -0.05 ~ -0.03 |
| Temperature Coefficient of iHc (%/°C) | -0.25 ~ -0.19 |