Effect of defects on the effective anisotropy and coercivity in nanometer hard magnetic materials

The effects of defects and intergrain exchange interactions on the effective anisotropy K eff and coercivity have been investigated in nanometer hard magnetic materials. The results showed K eff and coercivity simultaneously influenced by defects and intergrain exchange interactions are smaller than...

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Bibliographic Details
Published in:Solid state communications 2009-03, Vol.149 (9), p.393-395
Main Authors: Sun, Yan, Gao, Ruwei
Format: Article
Language:English
Subjects:
A. Nanometer hard magnetic materials
C. Defect
Condensed matter: electronic structure, electrical, magnetic, and optical properties
D. Coercivity
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Permanent magnets
Physics
Studies of specific magnetic materials
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Summary:The effects of defects and intergrain exchange interactions on the effective anisotropy K eff and coercivity have been investigated in nanometer hard magnetic materials. The results showed K eff and coercivity simultaneously influenced by defects and intergrain exchange interactions are smaller than that only influenced by the latter. This indicates that the existence of defects decreases K eff and coercivity. And the K eff and coercivity reduce with increasing the thickness r 0 of the defect. The coercivity we calculated is consistent with the experimental results given by Manaf et al.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2008.12.015