Lorentz TEM imaging of stripe structures embedded in a soft magnetic matrix

Basith, M.A., McVitie, S. , Strache, T., Fritzsche, M., Muecklich, A., Fassbender, J. and McCordy, J. (2015) Lorentz TEM imaging of stripe structures embedded in a soft magnetic matrix. Physical Review Applied, 4, 034012. (doi:10.1103/PhysRevApplied.4.034012)

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Abstract

N\'eel walls in soft magnetic NiFe/NiFeGa hybrid stripe structures surrounded by a NiFe film are investigated by high resolution Lorentz transmission electron microscopic imaging. An anti-parallel orientation of magnetization in 1000 nm wide neighboring unirradiated-irradiated stripes is observed by forming high angle domain walls during magnetization reversal. Upon downscaling the stripe structure size from 1000 nm to 200 nm a transition from a discrete domain pattern to an effective magnetic medium is observed for external magnetic field reversal. This transition is associated with vanishing ability of hosting high angle domain walls between adjacent stripes. The investigation also demonstrated the potentiality of Lorentz microscopy to image periodic stripe structures well under micron length-scale.

Item Type:Articles
Additional Information:Funding by DAAD-ARC and Grant No. DFG FA 314/3-2 is acknowledged.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McVitie, Professor Stephen
Authors: Basith, M.A., McVitie, S., Strache, T., Fritzsche, M., Muecklich, A., Fassbender, J., and McCordy, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Applied
Journal Abbr.:PR Applied
Publisher:American Physical Society
ISSN (Online):2331-7019
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