Mechanism of Rotational Hysteresis Energy in Sm--Fe--N Permanent Magnets |
| P. Pawlik, J.J. Wysłocki and K. Dziliński Institute of Physics, Technical University of Częstochowa, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
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| Received: August 24, 2001 |
| Investigations were carried out on Sm--Fe--N permanent magnet produced by the reactive diffusion method with different grain sizes (from 8.6 to 0.97 μm). The rotational hysteresis energy has been measured as a function of the applied field. The proposed model of rotational hysteresis energy is in good agreement with the experimental results. It is shown that the magnetization reversal process in Sm--Fe--N magnet is controlled by the nucleation of reversed domains. |
| PACS numbers: 75.30.--m, 75.60.--d |