On the angular anisotropy of the randomly averaged magnetic neutron scattering cross section of nanoparticles

[en] The magnetic small-angle neutron scattering (SANS) cross section of dilute ensembles of uniformly magnetized and randomly oriented Stoner–Wohlfarth particles is calculated using the Landau–Lifshitz equation. The focus of this study is on the angular anisotropy of the magnetic SANS signal as it can be seen on a two-dimensional position-sensitive detector. Depending on the symmetry of the magnetic anisotropy of the particles (e.g. uniaxial, cubic), an anisotropic magnetic SANS pattern may result, even in the remanent state or at the coercive field. The case of inhomogeneously magnetized particles and the effects of a particle-size distribution and interparticle correlations are also discussed.

Research center :

ULHPC - University of Luxembourg: High Performance Computing

Disciplines :

Physics

Author, co-author :

Adams, Michael Philipp ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

Sinaga, Evelyn Pratami ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

Michels, Andreas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

External co-authors :

yes

Language :

English

Title :

On the angular anisotropy of the randomly averaged magnetic neutron scattering cross section of nanoparticles

Publication date :

03 May 2023

Journal title :

IUCrJ

ISSN :

2052-2525

Publisher :

International Union of Crystallography, Chester, United Kingdom

Volume :

Issue :

Pages :

261-269

Peer reviewed :

Peer reviewed

Focus Area :

Physics and Materials Science

Additional URL :

https://journals.iucr.org/m/issues/2023/03/00/fs5216/

FnR Project :

FNR15639149 - Magnetic Neutron Scattering Of Nanoparticles: Analytical Theory And Experiment Beyond The Superspin Model, 2021 (01/10/2021-30/09/2025) - Michael Philipp Adams

Funders :

FNR - Fonds National de la Recherche [LU]

Available on ORBilu :

since 19 May 2023

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Bibliography

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