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Quantitative spatia...
Quantitative spatial magnetization distribution in iron oxide nanocubes and nanospheres by polarized small-angle neutron scattering
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Dish, Sabina (author)
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- Wetterskog, Erik (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Hermann, Raphäel P. (author)
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Wiedenmann, A. (author)
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Vainio, U. (author)
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- Salazar-Alvarez, German (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Bergström, Lennart (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Brückel, Thomas (author)
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(creator_code:org_t)
- 2012-01-16
- 2012
- English.
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In: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 14, s. 013025-
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- Materials Chemistry
- materialkemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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