MAGNETIC VISCOSITY AND DEMAGNETIZATION BEHAVIOUR IN ISOTROPIC NANOCRYSTALLINE Pr12Fe82B6 RIBBONS
Zhang Hong-wei (张宏伟)ab, Zhang Shao-ying (张绍英)a, Shen Bao-gen (沈保根)a, D. Gollb, H. Kronmüllerb
a State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; b Max-Planck-Institut für Metallforschung, Heisenbergstrasse 1, Stuttgart 70569, Germany
Abstract We present the experimental results of the magnetic viscosity, demagnetization curve and recoil loop for isotropic nanocrystalline Pr12Fe82B6 ribbons prepared by melt-spinning. The thermal fluctuation field, activation volume and irreversible demagnetization are discussed. The coercivity mechanism is mainly determined by the inhomogeneous nucleation rather than a simple nucleation of reverse domain.
Received: 17 October 2001
Accepted manuscript online:
(Saturation moments and magnetic susceptibilities)
Fund: Project supported by the State Key Project of Fundamental Research (G1998061305) and the National Natural Science Foundation (59971063) of China. H. W. Zhang was also supported by the exchanging plan between CAS (China) and MPG (Germany).
Cite this article:
Zhang Hong-wei (张宏伟), Zhang Shao-ying (张绍英), Shen Bao-gen (沈保根), D. Goll, H. Kronmüller MAGNETIC VISCOSITY AND DEMAGNETIZATION BEHAVIOUR IN ISOTROPIC NANOCRYSTALLINE Pr12Fe82B6 RIBBONS 2001 Chinese Physics 10 1169
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