Are Neodymium Magnets the Same as Rare Earth Magnets?
Short answer
Mostly, yes. Rare earth magnet is the family name for magnets made with rare earth elements. There are two main types: neodymium (NdFeB) and samarium cobalt (SmCo). Neodymium magnets are far more common and stronger, so when people say “rare earth magnet,” they usually mean neodymium.
The Permanent Magnet Family
Rare Earth Magnets
- Neodymium (NdFeB): strongest, most common, needs plating
- Samarium cobalt (SmCo): very heat- and corrosion-resistant, more expensive
Other Permanent Magnets
- Ferrite (ceramic): low cost, rust-proof, weaker
- Alnico: heat-stable, easily demagnetized
- Flexible: ferrite powder in rubber, cut to shape
Neodymium vs Samarium Cobalt
| Neodymium (NdFeB) | Samarium cobalt (SmCo) | |
|---|---|---|
| Strength (energy product) | 33 to 56 MGOe | About 16 to 32 MGOe |
| Max working temperature | 80°C standard, up to about 230°C for special grades | About 250 to 350°C |
| Corrosion resistance | Needs plating | Good without plating |
| Cost | Lower | Higher |
| Best for | Almost everything | High heat or harsh environments |
Everything we stock is neodymium. For high-temperature jobs, ask about high-temperature neodymium grades or a custom order.