An Intergrain Exchange Interaction in Nanostructured Nd-Fe-B type alloys and Its Energy Determination from the Remanence Temperature Dependences

摘要

A method for the numerical estimation of exchange interaction energy parameter (K_(IEI)) between neighbor grains in nanostructural (NS) hard magnetic materials with spontaneous spin-reorientation transition has been suggested and verified. Using this method it was shown for the first time that K_(IEI) value in MQP-B, MQP-B+, BZMP-2D and BZMP-2B type NS alloys is about 8 erg/cm~2.