Fluctuations of the Magnetic Field Generated by Permanent Magnets

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
1. Verfasser: Schloemann, E
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Sprache:eng
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container_issue 6
container_start_page 2470
container_title Journal of applied physics
container_volume 55
creator Schloemann, E
description 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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title Fluctuations of the Magnetic Field Generated by Permanent Magnets
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