DIFFERENT MAGNETIZATION PROCESSES IN MELT SPUN AND SINTERED Nd-Fe-B

Abstract

Magnetization processes in melt spun and sintered Nd-Fe-B-permanent magnets are significantly different because of their distinct grain size. We deduce from magnetization measurements on randomly oriented material that in melt spun Nd-FeB the homogeneous rotation of magnetization plays an important role in the whole field range, while for sintered magnets after thermal demagnetization an easy domain wall movement is the predominant process.