Abstract: The demagnetization curves for the nanocrystalline Nd-Fe-B magnets of the stoichiometric composition were calculated by using the finite element technique of micromagnetism. The curve, especially H-i(c) become smaller with increase of N. The most small H-i(c) from a series of the curves along different field directions is closer to that for N=infinity. H-i(c) increases with increase of L, and are close or some what smaller than that the experimental values should be.

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