Electron Holography Studies on Narrow Magnetic Domain Walls Observed in a Heusler Alloy Ni 50 Mn 25 Al 12.5 Ga 12.5

Peculiar magnetic domain walls produced in Heusler alloys, which have attracted renewed interest due to their potential application to actuators and spintronic devices, are studied here using electron holography. The observations reveal unexpectedly narrow magnetic domain walls, the width of which s...

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Bibliographic Details
Published in:Advanced functional materials 2012-08, Vol.22 (16), p.3434-3437
Main Authors: Park, Hyun Soon, Murakami, Yasukazu, Yanagisawa, Keiichi, Matsuda, Tsuyoshi, Kainuma, Ryosuke, Shindo, Daisuke, Tonomura, Akira
Format: Article
Language:English
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Summary:Peculiar magnetic domain walls produced in Heusler alloys, which have attracted renewed interest due to their potential application to actuators and spintronic devices, are studied here using electron holography. The observations reveal unexpectedly narrow magnetic domain walls, the width of which showed perfect agreement with that of the antiphase boundaries (APB, e.g., only 3 nm). While the results can be explained by the significant depression of ferromagnetism due to the local chemical disorder, the electron phase shift indicates that ferromagnetic correlation still remains in the APB region.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201103052