1. Magnetic Properties and Magnetic Viscosity of Pr4Fe76Co10B6Nb3Cu1 Nanocomposite Magnet
- Author
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N. D. The, N. H. Hai, H. D. Anh, V. V. Hiep, L. V. Vu, C. X. Huu, and N. Chau
- Subjects
Materials science ,Nanocomposite ,Amorphous metal ,Condensed matter physics ,Annealing (metallurgy) ,Magnet ,Nucleation ,General Physics and Astronomy ,Coercivity ,Amorphous solid ,Magnetic viscosity - Abstract
Magnetic Properties and Magnetic Viscosity of Pr4Fe76Co10B6Nb3Cu1 Nanocomposite Magnet N. D. The, N. H. Hai, H. D. Anh, V. V. Hiep, L. V. Vu, C. X. Huu and N. Chau Center for Materials Science, Hanoi University of Science, 334 Nguyen Trai Road, Hanoi, Vietnam (Received 15 July 2007) The nanocomposite magnet Pr4Fe76Co10B6Nb3Cu1 has been obtained by nanocrystallization of a rapidly-quenched amorphous ake. The in uence 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 Pr2Fe14B as hard phase were con rmed by X-ray di raction data. The magnetic viscosity as a function of the reverse eld was evaluated for all specimen. The results show that the magnetic viscosity coe cient peaks at a critical nucleation eld, at which the magnetization reversal of the specimens becomes irreversible. PACS numbers: 75.50.Vv, 75.50.Ww, 75.75.+a, 75.60.Lr
- Published
- 2008