Title :
Thermal fluctuation field in RE-TM-B permanent magnet materials
Author :
Liu, J.F. ; Pan, S.M. ; Luo, H.L. ; Hou, D.L. ; Nie, X.F.
Author_Institution :
Inst. of Phys., Chinese Acad. of Sci., Beijing, China
fDate :
9/1/1990 12:00:00 AM
Abstract :
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
Keywords :
boron alloys; coercive force; ferromagnetic properties of substances; iron alloys; neodymium alloys; permanent magnets; 100 to 500 K; Gaunt´s localized weak pinning model; Nd-Fe-B; coercive field; linear relationship; permanent magnet materials; sintered magnets; temperature dependence; thermal fluctuation field; Equations; Fluctuations; Hafnium; Magnetic anisotropy; Magnetic domain walls; Magnetic materials; Permanent magnets; Perpendicular magnetic anisotropy; Saturation magnetization; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
