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100 1 _ |a Ye, Jingfan
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245 _ _ |a Topologically stable helices in exchange coupled rare-earth/rare-earth multilayer with superspin-glass like ordering
260 _ _ |a London
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520 _ _ |a Existence of 2π-planar domain walls (DWs) are often reported for transition metal-rare-earth(TM/RE) layered systems. The magnetization process of such two-dimensional randomlyanisotropical system in the form of 2π-DWs is directly correlated with topologically stablehelices. Here, instead of TM/RE, we have investigated [Dy/Tb]10multilayers involving twodifferent anisotropic layers of rare-earth/rare-earth (RE/RE). Using magnetization and sus-ceptibility as function of temperature along with thermo-remanent magnetization measure-ments we have confirmed superspin-glass type of behavior within this RE/RE system.Additionally, an exchange biasfield up to–0.88 kOe (–88 mT) was also revealed for suchrare-earth based multilayers. Interestingly, using detailed analysis of the polarized neutronreflectometry profiles, wefind evidences of superimposed helical magnetic configurationswithin both materials of Dy and Tb associated with spin-frustrated interfaces. Furthermore,magnetizationfluctuations around the mean magnetization from vertically uncorrelateddomains were observed with polarized off-specular neutron scattering. We believe that coexistence of helical ground states with super spin-glass-like ordering are fundamentally instrumental for topologically stability in RE/RE systems, which in principle, can be exploited in all-spin-based technology.
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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700 1 _ |a Baldauf, Thomas
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700 1 _ |a Mattauch, Stefan
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700 1 _ |a Paul, Neelima
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700 1 _ |a Paul, Amitesh
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773 _ _ |a 10.1038/s42005-019-0210-0
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