F. Vonstaa et al., ON THE MAGNETIZATION PROCESSES OF ND-FE-B POWDERS PREPARED BY HDDR, Journal of magnetism and magnetic materials, 158, 1996, pp. 25-26
Nd-Fe-B powders prepared by HDDR are investigated. Using a torsion pen
dulum magnetometer, the magnetic stiffness and the energy dissipation
in alternating magnetic fields are measured. Both stiffness and energy
dissipation curves give evidence for interactions between neighboring
grains within each powder particle. Energy dissipation measurements a
fter thermal demagnetization give no hints for domain wall movements.