Fluctuations of the Magnetic Field Generated by Permanent Magnets
The short-term stability of the magnetic field generated by permanent magnets is calculated on the basis of spin-wave theory. The results indicate that the relative rms fluctuation of the magnetic field is inversely proportional to V exp 1/2 H exp 1/4 sub e , where V is the magnet volume and H sub e...
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| Veröffentlicht in: | Journal of applied physics 1983-11, Vol.55 (6), p.2470-2472 |
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| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The short-term stability of the magnetic field generated by permanent magnets is calculated on the basis of spin-wave theory. The results indicate that the relative rms fluctuation of the magnetic field is inversely proportional to V exp 1/2 H exp 1/4 sub e , where V is the magnet volume and H sub e the effective magnetic field inside the magnet. For SmCo sub 5 at room temp. the relative rms fluctuation of the magnetic field is calculated to be approx 0.2 x 10 exp --11 for V = 1 cm exp 3 and H sub e = 240 kOe.--AA |
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| ISSN: | 0021-8979 |