%0 Journal Article
%A Günther, A.
%A Bick, J.-P.
%A Szary, P.
%A Honecker, D.
%A Dewhurst, C. D.
%A Keiderling, U.
%A Feoktystov, Artem
%A Tschöpe, A.
%A Birringer, R.
%A Michels, A.
%T Magnetic field dependent small-angle neutron scattering on a Co nanorod array: evidence for intraparticle spin misalignment
%J Journal of applied crystallography
%V 47
%N 3
%@ 1600-5767
%C Copenhagen
%I Munksgaard
%M FZJ-2014-05687
%P 992 - 998
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000336738500019
%$ pmid:24904245
%R 10.1107/S1600576714008413
%U https://juser.fz-juelich.de/record/172190