Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8158067 | Journal of Magnetism and Magnetic Materials | 2013 | 5 Pages |
Abstract
The magnetic property and microstructure of Nd60âxFe30Al10Dyx (x=0, 2, 4) bulk ferromagnets have been investigated. At room temperature, each alloy sample shows hard magnetic behavior, and the intrinsic coercivity increases significantly with increasing Dy content. Transmission electron microscopy (TEM) and Atom probe tomography (APT) results show nanocrystals of width 5-20Â nm embedded in the Fe-rich amorphous matrix. The coercivity mechanism of the Nd60âxFe30Al10Dyx (x=0, 2, 4) amorphous alloys is discussed in the context of Gaunt's strong pinning model of domain walls. The crystallographic phases of nanocrystals identified by high-resolution TEM can act as pinning centers. Our findings give further insight into the coercivity mechanism of Nd-based bulk amorphous alloys through a better understanding of the nanostructural environment.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
X.H. Tan, S.J. Collocott, H.W. Liu, X.Y. Xiong, H. Xu,