Title :
Mechanism of magnetization reversal in Nd15.1Fe76.9 B8 permanent magnets
Author_Institution :
Inst. of Phys., Tech. Univ. of Czestochowa, Poland
fDate :
3/1/1994 12:00:00 AM
Abstract :
Major and minor hysteresis loop measurements have been performed on Nd15.1Fe76.9B8 sintered magnet. The coercivity as a function of the maximum magnetizing field has been determined. This dependence appeared to be typical of nucleation hardened materials. The domain structure behaviour during the magnetization reversal has been observed on the surface parallel to the alignment direction of the sample. Domain structure photographs have been correlated with suitable points on both virgin and demagnetization curves, respectively. It was stated from this observation that the demagnetization process occurs by the nucleation of reversed domains at the grain boundaries
Keywords :
boron alloys; coercive force; ferromagnetic properties of substances; iron alloys; magnetic hysteresis; magnetisation reversal; neodymium alloys; permanent magnets; Nd15.1Fe76.9B8; Nd15.1Fe76.9B8 permanent magnets; coercivity; domain structure; grain boundaries; hysteresis loop measurements; magnetization reversal; nucleation hardened materials; Coercive force; Demagnetization; Hysteresis; Iron; Magnetic domains; Magnetic field measurement; Magnetic materials; Magnetization reversal; Neodymium; Performance evaluation;
Journal_Title :
Magnetics, IEEE Transactions on
