Title :
Small angle neutron scattering from Nd15Fe77B118and Nd15Fe76Al1B118permanent magnets
Author :
Fujii, H. ; Saga, M. ; Takeda, T. ; Komura, S. ; Okamoto, T. ; Hirosawa, S. ; Sagawa, M.
Author_Institution :
Hiroshima University, Hiroshima, Japan
fDate :
9/1/1987 12:00:00 AM
Abstract :
Domain walls, grain boundaries of sintered Nd15Fe77B811and Nd15Fe76Al1B811permanent magnets with different heat treatments have been examined by small-angle neutron scattering experiments. The results indicate that (1) there are many Bloch walls in the grains (Nd2Fe14B) which form a thin layer containing the c-axis of the tetragonal Nd2Fe14B, the thickness of which is ∼70A, and (2) there are film-like precipitates along the grain boundaries where thickness decreases from 60 A to 40 A by heat treatment at 600°C for 1 h after sintering, correlating with the coercive field increasing.
Keywords :
Neutrons; Permanent magnets; Absorption; Coercive force; Magnetic domain walls; Magnetic domains; Magnetic separation; Neodymium; Neutron spin echo; Particle scattering; Permanent magnets; Storage area networks;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1987.1065352
