This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1107/S1600576714008413 in citations.
Please use the identifier: http://hdl.handle.net/2128/31324 in citations.
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 d[Sigma]/d[Omega] of the saturated sample in the two scattering geometries where the applie...
Saved in:
Personal Name(s): | Günther, A. (Corresponding Author) |
---|---|
Bick, J.-P. / Szary, P. / Honecker, D. / Dewhurst, C. D. / Keiderling, U. / Feoktystov, Artem / Tschöpe, A. / Birringer, R. / Michels, A. | |
Contributing Institute: |
JCNS-FRM-II; JCNS-FRM-II |
Published in: | Journal of applied crystallography, 47 (2014) 3, S. 992 - 998 |
Imprint: |
Copenhagen
Munksgaard
2014
|
PubMed ID: |
24904245 |
DOI: |
10.1107/S1600576714008413 |
Document Type: |
Journal Article |
Research Program: |
JCNS |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/31324 in citations.
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 d[Sigma]/d[Omega] 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 d[Sigma]/d[Omega] 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 d[Sigma]/d[Omega] is believed to be related to intradomain spin misalignment, due to magnetocrystalline and magnetoelastic anisotropies and magnetostatic stray fields. |