Toward Understanding Complex Spin Textures in Nanoparticles by Magnetic Neutron Scattering
In the quest to image the three-dimensional magnetization structure we show that the technique of magnetic small-angle neutron scattering (SANS) is highly sensitive to the details of the internal spin structure of nanoparticles. By combining SANS with numerical micromagnetic computations we study the transition from single-domain to multidomain behavior in nanoparticles and its implications for the ensuing magnetic SANS cross section. Above the critical single-domain size we find that the cross section and the related correlation function cannot be described anymore with the uniform particle model, resulting, e.g., in deviations from the well-known Guinier law. In the simulations we identify a clear signature for the occurrence of a vortexlike spin structure at remanence. The micromagnetic approach to magnetic SANS bears great potential for future investigations, since it provides fundamental insights into the mesoscale magnetization profile of nanoparticles.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:125 |
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| Enthalten in: |
Physical review letters - 125(2020), 11 vom: 11. Sept., Seite 117201 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Vivas, Laura G [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 28.09.2020 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1103/PhysRevLett.125.117201 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM315467908 |
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| 245 | 1 | 0 | |a Toward Understanding Complex Spin Textures in Nanoparticles by Magnetic Neutron Scattering |
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| 520 | |a In the quest to image the three-dimensional magnetization structure we show that the technique of magnetic small-angle neutron scattering (SANS) is highly sensitive to the details of the internal spin structure of nanoparticles. By combining SANS with numerical micromagnetic computations we study the transition from single-domain to multidomain behavior in nanoparticles and its implications for the ensuing magnetic SANS cross section. Above the critical single-domain size we find that the cross section and the related correlation function cannot be described anymore with the uniform particle model, resulting, e.g., in deviations from the well-known Guinier law. In the simulations we identify a clear signature for the occurrence of a vortexlike spin structure at remanence. The micromagnetic approach to magnetic SANS bears great potential for future investigations, since it provides fundamental insights into the mesoscale magnetization profile of nanoparticles | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Yanes, Rocio |e verfasserin |4 aut | |
| 700 | 1 | |a Berkov, Dmitry |e verfasserin |4 aut | |
| 700 | 1 | |a Erokhin, Sergey |e verfasserin |4 aut | |
| 700 | 1 | |a Bersweiler, Mathias |e verfasserin |4 aut | |
| 700 | 1 | |a Honecker, Dirk |e verfasserin |4 aut | |
| 700 | 1 | |a Bender, Philipp |e verfasserin |4 aut | |
| 700 | 1 | |a Michels, Andreas |e verfasserin |4 aut | |
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