001     201068
005     20240619091137.0
024 7 _ |a 10.1103/PhysRevB.87.014431
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024 7 _ |a 0556-2805
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024 7 _ |a 1095-3795
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024 7 _ |a 1098-0121
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024 7 _ |a 1550-235X
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024 7 _ |a 2128/8731
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037 _ _ |a FZJ-2015-03378
082 _ _ |a 530
100 1 _ |a Paul, Amitesh
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245 _ _ |a Change in interface magnetism of an exchange-coupled system due to the presence of nonmagnetic spacers
260 _ _ |a College Park, Md.
|c 2013
|b APS
336 7 _ |a Journal Article
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520 _ _ |a We report on the effect of nonmagnetic spacer layers on the interface magnetism and the exchange bias in the archetypical [Co/CoO]16 system. The separation of the magnetic bilayers by Au layers with various thicknesses dAu≥25 nm leads to a threefold increase of the exchange bias field (Heb). Reflectometry with polarized neutrons does not reveal any appreciable change in the domain population. This result is in agreement with the observation that the granular microstructure within the [Co/CoO] bilayers is independent of dAu. The significant reduction of the magnetic moments in the Co layers can be attributed to interfacial disorder at the Co-Au interfaces. Element-specific x-ray absorption spectroscopy attributes part of the enhancement of Heb to the formation of Co3O4 in the [Co/CoO] bilayers within the multilayers. A considerable proportion of the increase of Heb can be attributed to the loss of magnetization at each of the Co-Au interfaces with increasing dAu. We propose that the interfacial magnetism of ferro- and antiferromagnetic layers can be significantly altered by means of metallic spacer layers thus affecting the exchange bias significantly. This study shows that the magnetism in magnetic multilayers can be engineered by nonmagnetic spacer layers without involving the microstructure of the individual layers.
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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700 1 _ |a Paul, N.
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700 1 _ |a Jutimoosik, Jaru
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700 1 _ |a Yimnirun, Rattikorn
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700 1 _ |a Rujirawat, Saroj
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700 1 _ |a Höpfner, Britta
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700 1 _ |a Lauermann, Iver
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700 1 _ |a Lux-Steiner, M.
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700 1 _ |a Mattauch, Stefan
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700 1 _ |a Böni, Peter
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773 1 8 |a 10.1103/physrevb.87.014431
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|t Physical Review B
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773 _ _ |a 10.1103/PhysRevB.87.014431
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