Magnetic neutron scattering by magnetic vortices in thin submicron-sized soft ferromagnetic cylinders.

Abstract:

:Using analytical expressions for the magnetization textures of thin submicron-sized magnetic cylinders in vortex state, we derive closed-form algebraic expressions for the ensuing small-angle neutron scattering (SANS) cross sections. Specifically, for the perpendicular and parallel scattering geometries, we have computed the cross sections for the case of small vortex-center displacements without formation of magnetic charges on the side faces of the cylinder. The results represent a significant qualitative and quantitative step forward in SANS-data analysis on isolated magnetic nanoparticle systems, which are commonly assumed to be homogeneously or stepwise-homogeneously magnetized. We suggest a way to extract the fine details of the magnetic vortex structure during the magnetization process from the SANS measurements in order to help resolving the long-standing question of the magnetic vortex displacement mode.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Metlov KL,Michels A

doi

10.1038/srep25055

subject

Has Abstract

pub_date

2016-04-26 00:00:00

pages

25055

issn

2045-2322

pii

srep25055

journal_volume

6

pub_type

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