Authors
Thomas Maurer, Sébastien Gautrot, Frédéric Ott, Grégory Chaboussant, Fatih Zighem, Laurent Cagnon, Olivier Fruchart,
Title
Ordered arrays of magnetic nanowires investigated by polarized small-angle neutron scattering
In
Physical Review B
Volume
89
Issue
184423
Pages
1–9
Year
2014
Indexed by
Abstract
Polarized small-angle neutron scattering (PSANS) experimental results obtained on arrays of ferromagnetic Co nanowires (ϕ≈13 nm) embedded in self-organized alumina (Al2O3) porous matrices are reported. The triangular array of aligned nanowires is investigated as a function of the external magnetic field with a view to determine experimentally the real space magnetization M⃗ (r⃗ ) distribution inside the material during the magnetic hysteresis cycle. The observation of field-dependent SANS intensities allows us to characterize the influence of magnetostatic fields. The PSANS experimental data are compared to magnetostatic simulations. These results evidence that PSANS is a technique able to address real-space magnetization distributions in nanostructured magnetic systems. We show that beyond structural information (shape of the objects, two-dimensional organization) already accessible with nonpolarized SANS, using polarized neutrons as the incident beam provides information on the magnetic form factor and stray fields μ0Hd distribution in between nanowires.
Affiliations
Offprint