Ordered arrays of magnetic nanowires investigated by polarized small-angle neutron scattering - Institut Galilée Université Paris 13 Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2014

Ordered arrays of magnetic nanowires investigated by polarized small-angle neutron scattering

Grégory Chaboussant
Laurent Cagnon
Olivier Fruchart
Frédéric Ott

Résumé

Polarized small-angle neutron scattering (PSANS) experimental results obtained on arrays of ferromagnetic Co nanowires (ϕ≈13 nm) embedded in self-organized alumina (Al$_2$O$_3$) 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 $M$($r$) 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 ${μ_0H_d}$ distribution in between nanowires.
Fichier principal
Vignette du fichier
4c7b4e9b734d347867f28af8ce9e7b28.pdf (2.24 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01002369 , version 1 (19-06-2024)

Identifiants

Citer

Thomas Maurer, Sébastien Gautrot, Grégory Chaboussant, Fatih Zighem, Laurent Cagnon, et al.. Ordered arrays of magnetic nanowires investigated by polarized small-angle neutron scattering. Physical Review B, 2014, 89 (18), pp.184423. ⟨10.1103/PhysRevB.89.184423⟩. ⟨hal-01002369⟩
176 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More