Reference : Uniaxial polarization analysis of bulk ferromagnets: theory and first experimental results

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/51467

Title :	Uniaxial polarization analysis of bulk ferromagnets: theory and first experimental results
Language :	English
Author, co-author :	Malyeyev, Artem [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Titov, Ivan [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Dewhurst, Charles [Institut Laue-Langevin]
	Suzuki, Kiyonori [Monash University > Department of Materials Science and Engineering]
	Honecker, Dirk [ISIS Neutron and Muon Source]
	Michels, Andreas [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Publication date :	1-Jun-2022
Journal title :	Journal of Applied Crystallography
Publisher :	Blackwell
Volume :	55
Special issue title :	Magnetic Small-Angle Neutron Scattering - from Nanoscale Magnetism to Long-Range Magnetic Structures
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	0021-8898
e-ISSN :	1600-5767
City :	Oxford
Country :	United Kingdom
Keywords :	[en] polarized neutron scattering ; uniaxial polarization analysis ; small-angle neutron scattering ; micromagnetics ; magnetic nanocomposites
Abstract :	[en] Based on Brown’s static equations of micromagnetics, the uniaxial polarization of the scattered neutron beam of a bulk magnetic material is computed. The approach considers a Hamiltonian that takes into account the isotropic exchange interaction, the antisymmetric Dzyaloshinskii–Moriya interaction, magnetic anisotropy, the dipole–dipole interaction, as well as the effect of an applied magnetic field. In the high-field limit, the solutions for the magnetization Fourier components are used to obtain closed-form results for the spinpolarized SANS (small-angle neutron scattering) cross sections and the ensuing polarization. The theoretical expressions are compared with experimental data on a soft magnetic nanocrystalline alloy. The micromagnetic SANS theory provides a general framework for polarized real-space neutron methods, and it may open up a new avenue for magnetic neutron data analysis on magnetic microstructures.
Funders :	Fonds National de la Recherche - FnR
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/10993/51467
DOI :	10.1107/S1600576722003508

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