Dataset Open Access
Neugebauer, Nils; Hache, Toni; Elm, M.; Hofmann, D. M.; Heiliger, C.; Schultheiß, Helmut; Klar, P. J.
<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> <dc:creator>Neugebauer, Nils</dc:creator> <dc:creator>Hache, Toni</dc:creator> <dc:creator>Elm, M.</dc:creator> <dc:creator>Hofmann, D. M.</dc:creator> <dc:creator>Heiliger, C.</dc:creator> <dc:creator>Schultheiß, Helmut</dc:creator> <dc:creator>Klar, P. J.</dc:creator> <dc:date>2020-11-09</dc:date> <dc:description>We present a frequency and magnetic field dependent investigation of ordered arrangements of 20 nm magnetic nanoparticles (MNPs) consisting of magnetite (Fe3O4) by employing micro Brillouin light scattering microscopy. We utilized electron beam lithography to prepare hexagonally arranged, circularly shaped MNPassemblies consisting of a single layer of MNPs using a variant of the Langmuir-Blodgett technique. By comparing the results with non-structured, layered superlattices of MNPs, further insight into the influence of size and geometry of the arrangement on the collective properties is obtained. We show that at low static external field strengths, two signals occur in frequency dependent measurements for both non-structured and structured assemblies. Enlarging the static external field strength leads to a sharpening of the main signal, while the satellite signal decreases in its intensity and increases in its linewidth. The occurrence of multiple signals at low external field strengths is also confirmed by sweeping the static external field and keeping the excitation frequency constant. Micromagnetic simulations unravel the origin of the different signals and their dependence on the static external field strength, enabling an interpretation of the observed characteristics in terms of different local environments of an MNPs forming the MNP assembly.</dc:description> <dc:identifier>https://rodare.hzdr.de/record/578</dc:identifier> <dc:identifier>10.14278/rodare.578</dc:identifier> <dc:identifier>oai:rodare.hzdr.de:578</dc:identifier> <dc:relation>url:https://www.hzdr.de/publications/Publ-31690</dc:relation> <dc:relation>url:https://www.hzdr.de/publications/Publ-31689</dc:relation> <dc:relation>doi:10.14278/rodare.577</dc:relation> <dc:relation>url:https://rodare.hzdr.de/communities/rodare</dc:relation> <dc:rights>info:eu-repo/semantics/openAccess</dc:rights> <dc:rights>https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights> <dc:title>Frequency- and magnetic-field-dependent properties of ordered magnetic nanoparticle arrangements</dc:title> <dc:type>info:eu-repo/semantics/other</dc:type> <dc:type>dataset</dc:type> </oai_dc:dc>
All versions | This version | |
---|---|---|
Views | 516 | 513 |
Downloads | 7 | 7 |
Data volume | 298.5 MB | 298.5 MB |
Unique views | 260 | 259 |
Unique downloads | 7 | 7 |