Numerical Calculation of Magnetic form Factors of Complex Shape Nano-Particles Coupled with Micromagnetic Simulations

Fatih Zighem (1, 2) , Frédéric Ott (2) , Thomas Maurer (3, 2) , Grégory Chaboussant (2) , Jean-Yves Piquemal (4) , G. Viau (5)

1 LSPM - Laboratoire des Sciences des Procédés et des Matériaux
2 LLB - UMR 12 - Laboratoire Léon Brillouin
3 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
4 ITODYS (UMR_7086) - Interfaces, Traitements, Organisation et Dynamique des Systèmes
5 LPCNO - Laboratoire de physique et chimie des nano-objets

We investigate the calculation of the magnetic form factors of nano-objects with complex geometrical shapes and non homogeneous magnetization distributions. We describe a numerical procedure which allows to calculate the 3D mag- netic form factor of nano-objects from realistic magnetization distributions obtained by micromagnetic calculations. This is illustrated in the canonical cases of spheres, rods and platelets. This work is a first step towards a 3D vectorial reconstruction of the magnetization at the nanometric scale using neutron scattering techniques.

Keywords: polarized SANS; Form factor; Micromagnetic simulations

Domains: Optics / Photonic

Fatih Zighem, Frédéric Ott, Thomas Maurer, Grégory Chaboussant, Jean-Yves Piquemal, et al.. Numerical Calculation of Magnetic form Factors of Complex Shape Nano-Particles Coupled with Micromagnetic Simulations. 9th International Conference on Polarised Neutrons in Condensed Matter Investigations, Jul 2012, Paris, France. pp.66-73, ⟨10.1016/j.phpro.2013.03.177⟩. ⟨hal-02870195⟩