Hyper-domains in exchange bias micro-stripe pattern

Theis-Broehl K, Westphalen A, Zabel H, Ruecker U, McCord J, Hoeink V, Schmalhorst J-M, Reiss G, Weis T, Engel D, Ehresmann A, et al. (2008)
NEW JOURNAL OF PHYSICS 10(9): 093021.

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Abstract
A combination of experimental techniques, e. g. vector-MOKE magnetometry, Kerr microscopy and polarized neutron reflectometry, was applied to study the field induced evolution of the magnetization distribution over a periodic pattern of alternating exchange bias (EB) stripes. The lateral structure is imprinted into a continuous ferromagnetic/antiferromagnetic EB bilayer via laterally selective exposure to He-ion irradiation in an applied field. This creates an alternating frozen-in interfacial EB field competing with the external field in the course of the re-magnetization. It was found that in a magnetic field applied at an angle with respect to the EB axis parallel to the stripes the re-magnetization process proceeds via a variety of different stages. They include coherent rotation of magnetization towards the EB axis, precipitation of small random (ripple) domains, formation of a stripe-like alternation of the magnetization, and development of a state in which the magnetization forms large hyper-domains comprising a number of stripes. Each of those magnetic states is quantitatively characterized via the comprehensive analysis of data on specular and off-specular polarized neutron reflectivity. The results are discussed within a phenomenological model containing a few parameters, which can readily be controlled by designing systems with a desired configuration of magnetic moments of micro-and nano-elements.
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Theis-Broehl K, Westphalen A, Zabel H, et al. Hyper-domains in exchange bias micro-stripe pattern. NEW JOURNAL OF PHYSICS. 2008;10(9): 093021.
Theis-Broehl, K., Westphalen, A., Zabel, H., Ruecker, U., McCord, J., Hoeink, V., Schmalhorst, J. - M., et al. (2008). Hyper-domains in exchange bias micro-stripe pattern. NEW JOURNAL OF PHYSICS, 10(9): 093021.
Theis-Broehl, K., Westphalen, A., Zabel, H., Ruecker, U., McCord, J., Hoeink, V., Schmalhorst, J. - M., Reiss, G., Weis, T., Engel, D., et al. (2008). Hyper-domains in exchange bias micro-stripe pattern. NEW JOURNAL OF PHYSICS 10:093021.
Theis-Broehl, K., et al., 2008. Hyper-domains in exchange bias micro-stripe pattern. NEW JOURNAL OF PHYSICS, 10(9): 093021.
K. Theis-Broehl, et al., “Hyper-domains in exchange bias micro-stripe pattern”, NEW JOURNAL OF PHYSICS, vol. 10, 2008, : 093021.
Theis-Broehl, K., Westphalen, A., Zabel, H., Ruecker, U., McCord, J., Hoeink, V., Schmalhorst, J.-M., Reiss, G., Weis, T., Engel, D., Ehresmann, A., Toperverg, B.P.: Hyper-domains in exchange bias micro-stripe pattern. NEW JOURNAL OF PHYSICS. 10, : 093021 (2008).
Theis-Broehl, K., Westphalen, A., Zabel, H., Ruecker, U., McCord, J., Hoeink, V., Schmalhorst, Jan-Michael, Reiss, Günter, Weis, T., Engel, D., Ehresmann, A., and Toperverg, B. P. “Hyper-domains in exchange bias micro-stripe pattern”. NEW JOURNAL OF PHYSICS 10.9 (2008): 093021.
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