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000019989 084__ $$2WoS$$aPhysics, Multidisciplinary
000019989 1001_ $$0P:(DE-Juel1)VDB73876$$aDisch, S.$$b0$$uFZJ
000019989 245__ $$aQuantitative spatial magnetization distribution in iron oxide nanocubes and nanospheres by polarized small-angle neutron scattering
000019989 260__ $$a[Bad Honnef]$$bDt. Physikalische Ges.$$c2012
000019989 300__ $$a013025
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000019989 440_0 $$08201$$aNew Journal of Physics$$v14$$x1367-2630
000019989 500__ $$aWe 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).
000019989 520__ $$aBy means of polarized small-angle neutron scattering, we have resolved the long-standing challenge of determining the magnetization distribution in magnetic nanoparticles in absolute units. The reduced magnetization, localized in non-interacting nanoparticles, indicates strongly particle shape-dependent surface spin canting with a 0.3(1) and 0.5(1) nm thick surface shell of reduced magnetization found for similar to 9 nm nanospheres and similar to 8.5 nm nanocubes, respectively. Further, the reduced macroscopic magnetization in nanoparticles results not only from surface spin canting, but also from drastically reduced magnetization inside the uniformly magnetized core as compared to the bulk material. Our microscopic results explain the low macroscopic magnetization commonly found in nanoparticles.
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000019989 7001_ $$0P:(DE-HGF)0$$aWetterskog, E.$$b1
000019989 7001_ $$0P:(DE-Juel1)130706$$aHermann, R.$$b2$$uFZJ
000019989 7001_ $$0P:(DE-HGF)0$$aWiedenmann, A.$$b3
000019989 7001_ $$0P:(DE-HGF)0$$aVainio, U.$$b4
000019989 7001_ $$0P:(DE-HGF)0$$aSalazar-Alvarez, G.$$b5
000019989 7001_ $$0P:(DE-HGF)0$$aBergström, L.$$b6
000019989 7001_ $$0P:(DE-Juel1)130572$$aBrückel, T.$$b7$$uFZJ
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000019989 8567_ $$uhttp://dx.doi.org/10.1088/1367-2630/14/1/013025
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