Rare earth magnets are a special type of magnet. They are the worlds strongest type of magnet and are composed of Neodymium, Iron and Boron (NdFeB) elements.
| Magnet | Mr (T) | Hci (kA/m) | BHmax (kJ/m3) | TC (°C) |
|---|---|---|---|---|
| Nd2Fe14B (sintered) | 1.0–1.4 | 750–2000 | 200–440 | 310–400 |
| Nd2Fe14B (bonded) | 0.6–0.7 | 600–1200 | 60–100 | 310–400 |
| SmCo5 (sintered) | 0.8–1.1 | 600–2000 | 120–200 | 720 |
| Sm(Co, Fe, Cu, Zr)7 (sintered) | 0.9–1.15 | 450–1300 | 150–240 | 800 |
| Alnico (sintered) | 0.6–1.4 | 450–1300 | 150–240 | 800 |
| Sm(Co, Fe, Cu, Zr)7 (sintered) | 0.9–1.15 | 275 | 10–88 | 700–860 |
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