Magnetic field dependent small-angle neutron scattering on a Co nanorod array evidence for intraparticle spin misalignment

Magnetic field dependent small-angle neutron scattering on a Co nanorod array : evidence for intraparticle spin misalignment

The structural and magnetic properties of a cobalt nanorod array have been studied by means of magnetic field dependent small-angle neutron scattering (SANS). Measurement of the unpolarized SANS cross section dΣ/dΩ of the saturated sample in the two scattering geometries where the applied magnetic f...

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Veröffentlicht in:Journal of applied crystallography. - 1998. - 47(2014), Pt 3 vom: 01. Juni, Seite 992-998
1. Verfasser: Günther, A (VerfasserIn)
Weitere Verfasser: Bick, J-P, Szary, P, Honecker, D, Dewhurst, C D, Keiderling, U, Feoktystov, A V, Tschöpe, A, Birringer, R, Michels, A
Format: Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Journal of applied crystallography
Schlagworte:Journal Article magnetic materials magnetism nanorods small-angle neutron scattering
Beschreibung
Zusammenfassung:The structural and magnetic properties of a cobalt nanorod array have been studied by means of magnetic field dependent small-angle neutron scattering (SANS). Measurement of the unpolarized SANS cross section dΣ/dΩ of the saturated sample in the two scattering geometries where the applied magnetic field H is either perpendicular or parallel to the wavevector ki of the incoming neutron beam allows one to separate nuclear from magnetic SANS, without employing the usual sector-averaging procedure. The analysis of the SANS data in the saturated state provides structural parameters (rod radius and centre-to-centre distance) that are in good agreement with results from electron microscopy. Between saturation and the coercive field, a strong field dependence of dΣ/dΩ is observed (in both geometries), which cannot be explained using the conventional expression of the magnetic SANS cross section of magnetic nanoparticles in a homogeneous nonmagnetic matrix. The origin of the strong field dependence of dΣ/dΩ is believed to be related to intradomain spin misalignment, due to magnetocrystalline and magnetoelastic anisotropies and magnetostatic stray fields
Beschreibung:Date Revised 21.03.2024
published: Electronic-eCollection
Citation Status PubMed-not-MEDLINE
ISSN:0021-8898