Title :
Magnetisation mechanisms and magnetic viscosity in NdFeB alloys
Author :
Ferguson, G.B. ; O´Grady, K. ; Popplewell, J.
Author_Institution :
Sch. of Electron. Eng. Sci., Univ. Coll. of North Wales, Bangor, UK
fDate :
9/1/1989 12:00:00 AM
Abstract :
Initial magnetization, demagnetization, and magnetic viscosity data are presented for sintered and melt-spun NdFeB over a range of temperatures. A model based on strong domain wall pinning is used to investigate the energy barriers in operation in each case. Temperature is observed to have little effect on magnetization of the material, whereas the demagnetization process is found to be greatly affected. This seems to imply that very different mechanisms are at work in the magnetization and demagnetization processes
Keywords :
boron alloys; demagnetisation; ferromagnetic properties of substances; iron alloys; magnetic domain walls; magnetic hysteresis; magnetisation; melt spinning; neodymium alloys; permanent magnets; sintering; NdFeB; demagnetization; domain wall pinning; energy barriers; hysteresis loop; initial magnetisation; magnetic viscosity; melt spun magnets; permanent magnet; sintering; Energy barrier; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Magnetic materials; Magnetic separation; Perpendicular magnetic anisotropy; Saturation magnetization; Viscosity;
Journal_Title :
Magnetics, IEEE Transactions on
