TY  - JOUR
AU  - Günther, A.
AU  - Bick, J.-P.
AU  - Szary, P.
AU  - Honecker, D.
AU  - Dewhurst, C. D.
AU  - Keiderling, U.
AU  - Feoktystov, Artem
AU  - Tschöpe, A.
AU  - Birringer, R.
AU  - Michels, A.
TI  - Magnetic field dependent small-angle neutron scattering on a Co nanorod array: evidence for intraparticle spin misalignment
JO  - Journal of applied crystallography
VL  - 47
IS  - 3
SN  - 1600-5767
CY  - Copenhagen
PB  - Munksgaard
M1  - FZJ-2014-05687
SP  - 992 - 998
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000336738500019
C6  - pmid:24904245
DO  - DOI:10.1107/S1600576714008413
UR  - https://juser.fz-juelich.de/record/172190
ER  -