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the magnetic anisotropy constant of Er ions and the Er–Fe exchange-coupling parameter were estimated across an easy magnetization direction. It has been suggested that Nd ions formed two sublattices in the Nd2Fe14B structure, which possess different anisotropy types [3]. Each of sublattice magneti-zations tends to orient along its own easy magnetization direction which results in a canted magnetic structure. In such case the MCA constants can be considered only as some effective parameters describing magnetization curves. The task of determination of soft ferrom e can hav wider and higher hysteresis loop. At present a relatively amount of exchange-spring magnets is prepared only by me ning with wheel surface speed of tens meters per second. Ho there is a grave problem in the technology of such materials – iso-tropic distribution of the easy directions of the Nd2Fe14B nano-grains which reduces the remanence ratio Mr/Ms (where Mr and Ms are the remanent and saturation magnetizations, respectively) of these magnets. An attempt of improvement of the technology was made in Ref. [5]: authors tried to prepare anisotropic powder from melt-spun alloys by means of crushing its flakes to a small ⇑ Corresponding author. Tel.: +420 221912735. Journal of Alloys and Compounds 581 (2013) 423–430 Contents lists availab s a.e lE-mail address