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No.4(pp.129-168)
Home > Issues > Volume 8 (2003) > No.4(pp.129-168)
 
Inter-grain Exchange Interactions for Nanocrystalline Nd2.33Fe14B1.06Si0.21 Magnets
Journal of Magnetics, Volume 8, Number 4, 31 Dec 2003, Pages 157-159
Hanmin Jin* (Department of Physics, Jilin University), Yu Yan(Department of Physics, Jilin University, State Key Laboratory for Superhard Materials, Jilin University), Xuefeng Wang(Department of Physics, Jilin University), Feng Su(Department of Physics, Jilin University)
Abstract
The strengths of the inter-grain exchange interaction were evaluated for nanocrystalline Nd2.33Fe14B1.06Si0.21 magnets of different grain size by comparing the iHc calculated by micromagnetics with the experiments. With increase of the grain boundary thickness to that of the magnet of grain diameter 12.4, 24.8, 37.2 and 49.6 nm, the strengh of the interaction in reference to that without the grain boundary phase decreases to 83％, 69％, 54％ and 42％.
Keywords: rare-earth permanent magnet; micromagnetics; coercivity; exchange interaction; nanocrystal
DOI:
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