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Thermal fluctuation field in RE-TM-B permanent magnet materials

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5 Author(s)
Liu, J.F. ; Inst. of Phys., Chinese Acad. of Sci., Beijing, China ; Pan, S.M. ; Luo, H.L. ; Hou, D.L.
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The temperature dependence of the coercive field (Hc ) and the thermal fluctuation field (Hf) of Nd-Fe-B sintered magnets was measured from 100 K to 500 K. It was found that a linear relationship exists between lgH f and lgHc in this temperature range. The relationship between lg Hc and lgHf was deduced from Gaunt's localized weak pinning model. Values of l gHc calculated from the derived relationship are in very good agreement with experimental values

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Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 5 )