Journal Article

Electron holography study of magnetization behavior in the writer pole of a perpendicular magnetic recording head by a 1 MV transmission electron microscope

Kei Hirata, Yoichi Ishida, Tetsuya Akashi, Daisuke Shindo and Akira Tonomura

in Microscopy

Published on behalf of The Japanese Society of Microscopy

Volume 61, issue 5, pages 305-308
Published in print October 2012 | ISSN: 2050-5698
Published online June 2012 | e-ISSN: 2050-5701 | DOI: http://dx.doi.org/10.1093/jmicro/dfs051
Electron holography study of magnetization behavior in the writer pole of a perpendicular magnetic recording head by a 1 MV transmission electron microscope

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The magnetic domain structure of the writer poles of perpendicular magnetic recording heads was studied using electron holography. Although the domain structure of a 100-nm-thick writer pole could be observed with a 300 kV transmission electron microscope, that of the 250-nm-thick writer pole could not be analyzed due to the limited transmission capability of the instrument. On the other hand, the detailed domain structure of the 250-nm-thick writer pole was successfully analyzed by a 1 MV electron microscope using its high transmission capability. The thickness and material dependency of the domain structure of a writer pole were discussed.

Keywords: electron holography; 1 MV transmission electron microscope; magnetic domain structure; magnetic recording head

Journal Article.  2006 words.  Illustrated.

Subjects: Biological Sciences

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