nanocrystalline permanent

作者:郑波;赵素芬;
关键词:nanocrystalline permanent

magnets;coercivity;micromagnetics;finite element method;rare

earths
单位:Department of Physics, Beihang University;
摘要:Magnetization configurations were calculated under various

magnetic fields for nanocrystalline magnetic materials Pr-Fe-B permanent magnets by

micromagnetic finite element method.According to the

configurations during demagnetization process, the mechanism of

magnetization reversal was http://www.999magnet.com analyzed.For the Pr2Fe14B with 10 nm

grains or its composite with 10vol.% α-Fe, the coercivity was

determined by nucleation of reversed domain that took place at

grain boundaries.However, for Pr2Fe14B with 30 nm grains,

coercivity was controlled by pinning of the nucle-ated domain.For

Pr2Fe14B/α-Fe with 30vol.% α-Fe, the demagnetization behavior

was characterized by continuous reversal of α-Fe moment.