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001     19989
005     20250129094338.0
024 7 _ |a 10.1088/1367-2630/14/1/013025
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082 _ _ |a 530
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|a Physics, Multidisciplinary
100 1 _ |a Disch, S.
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245 _ _ |a Quantitative spatial magnetization distribution in iron oxide nanocubes and nanospheres by polarized small-angle neutron scattering
260 _ _ |a [Bad Honnef]
|b Dt. Physikalische Ges.
|c 2012
300 _ _ |a 013025
336 7 _ |a Journal Article
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440 _ 0 |a New Journal of Physics
|x 1367-2630
|0 8201
|v 14
500 _ _ |a We acknowledge the ILL, HASYLAB/DESY and APS for the provision of neutron and synchrotron beamtime at D22, B1 and 6-ID-D, respectively, and the German National Academic Foundation for financial support (to SD).
520 _ _ |a By means of polarized small-angle neutron scattering, we have resolved the long-standing challenge of determining the magnetization distribution in magnetic nanoparticles in absolute units. The reduced magnetization, localized in non-interacting nanoparticles, indicates strongly particle shape-dependent surface spin canting with a 0.3(1) and 0.5(1) nm thick surface shell of reduced magnetization found for similar to 9 nm nanospheres and similar to 8.5 nm nanocubes, respectively. Further, the reduced macroscopic magnetization in nanoparticles results not only from surface spin canting, but also from drastically reduced magnetization inside the uniformly magnetized core as compared to the bulk material. Our microscopic results explain the low macroscopic magnetization commonly found in nanoparticles.
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700 1 _ |a Wetterskog, E.
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700 1 _ |a Hermann, R.
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700 1 _ |a Wiedenmann, A.
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700 1 _ |a Vainio, U.
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700 1 _ |a Salazar-Alvarez, G.
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700 1 _ |a Bergström, L.
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700 1 _ |a Brückel, T.
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773 _ _ |a 10.1088/1367-2630/14/1/013025
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856 7 _ |u http://dx.doi.org/10.1088/1367-2630/14/1/013025
856 4 _ |u https://juser.fz-juelich.de/record/19989/files/FZJ-19989.pdf
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914 1 _ |y 2012
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