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Exploring the limits of soft x-ray magnetic holography: Imaging magnetization reversal of buried interfaces

Abstract : Only a very few experimental techniques can address the microscopic magnetization reversal behavior of the different magnetic layers in a multilayered system with element selectivity. We present an element-selective study of ferromagnetic (FM) [Co/Pt]n multilayers with perpendicular anisotropy exchange-coupled to antiferromagnetic (AFM) FeMn and IrMn films performed with a new experimental set-up developed for both soft x-ray spectroscopy and holography imaging purposes. The spectroscopy analysis allows the quantification of the unpinned (pinned) uncompensated AFM moments, providing direct evidence of its parallel (antiparallel) alignment with respect to the FM moments. The holography experiments give a direct view of both FM and uncompensated AFM magnetic structures, showing that they replicate to each other during magnetization reversal. Remarkably, we show magnetic images for effective thicknesses as small as one monolayer. Our results provide new microscopic insights into the exchange coupling phenomena and explore the sensitivity limits of these techniques. Future trends are also discussed.
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https://hal.archives-ouvertes.fr/hal-00587347
Contributor : Jan Vogel <>
Submitted on : Wednesday, April 20, 2011 - 11:06:56 AM
Last modification on : Tuesday, January 19, 2021 - 11:08:17 AM

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Julio Camarero, E. Jimenez, Jan Vogel, Carsten Tieg, P. Perna, et al.. Exploring the limits of soft x-ray magnetic holography: Imaging magnetization reversal of buried interfaces. Journal of Applied Physics, American Institute of Physics, 2011, 109, pp.07D357. ⟨10.1063/1.3567035⟩. ⟨hal-00587347⟩

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