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Title: Remanence enhancement of single-phased isotropic nanostructured permanent magnets
Authors: Zhao, G.P. 
Ong, C.K. 
Feng, Y.P. 
Lim, H.S. 
Ding, J. 
Keywords: 75.50.Tt
Analytical model
Exchange interaction
Remanence enhancement
Single domain
Single phase
Issue Date: 2-Mar-1999
Citation: Zhao, G.P.,Ong, C.K.,Feng, Y.P.,Lim, H.S.,Ding, J. (1999-03-02). Remanence enhancement of single-phased isotropic nanostructured permanent magnets. Journal of Magnetism and Magnetic Materials 192 (3) : 543-552. ScholarBank@NUS Repository.
Abstract: Based on a simple micromagnet model, we show that an analytical expression for reduced remanence in single-phased and single-domain isotropic nanostructured permanent magnetic materials can be written as Mr/MS=0.5+1.8Δ0/L, where Mr, MS, Δ0, and L are the remanence, saturation magnetization, exchange length and the average grain size, respectively. This formula reveals that our calculated remanence is larger than the predictions of the Stoner-Wohlfarth model for all particle sizes, and that remanence enhancement increases with decreasing grain size. Application of the relation to melt-spun Nd-Fe-B magnets shows good agreement with available experimental and numerical data. © 1999 Elsevier Science B.V.
Source Title: Journal of Magnetism and Magnetic Materials
ISSN: 03048853
Appears in Collections:Staff Publications

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