Amorphous alloys Magnetic aftereffect Nanocomposite magnets Permanent magnets
Issue Date:
2008
Publisher:
Journal of the Korean Physical Society
Citation:
Volume: 52, Issue: 5, Page : 1415-1418
Abstract:
The nanocomposite magnet Pr4Fe76Co10B 6Nb3Cu1 has been obtained by nanocrystallization of
a rapidly-quenched amorphous flake. The influence of the annealing process on the structural and the
magnetic properties are investigated. High magnetic hardness was reached with of large coercivity of Hc =
3.65 kOe, a remanent induction of Mr = 12.0 kG, Mr/Ms = 0.79 and maximum energy product (BH)max =
17.6 MGOe at optimal annealing conditions. The multiphase structures of Fe3B as soft phases and of Pr2Fe
14B as hard phase were confirmed by X-ray diffraction data. The magnetic viscosity as a function of the
reverse field was evaluated for all specimen. The results show that the magnetic viscosity coefficient peaks
at a critical nucleation field, at which the magnetization reversal of the specimens becomes irreversible.
