Journal Article

Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Young-Gil Park, Jun-Mo Yang and Daisuke Shindo

in Microscopy

Published on behalf of The Japanese Society of Microscopy

Volume 53, issue 3, pages 267-270
Published in print June 2004 | ISSN: 2050-5698
Published online June 2004 | e-ISSN: 2050-5701 | DOI: http://dx.doi.org/10.1093/jmicro/53.3.267
Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

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Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy, the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

Keywords: EDS elemental mapping; electron holography; Lorentz microscopy; lines of magnetic flux; Sm-Co magnet

Journal Article.  0 words. 

Subjects: Biological Sciences

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