Article (Scientific journals)
Neutron study of magnetic correlations in rare-earth-free Mn-Bi magnets
MALYEYEV, Artem; Titov, Ivan; Bender, Philipp et al.
2021In Physical Review Materials, 5, p. 034407
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Keywords :
Condensed Matter - Materials Science
Abstract :
[en] We report the results of an unpolarized small-angle neutron scattering (SANS) study on Mn-Bi-based rare-earth-free permanent magnets. The magnetic SANS cross section is dominated by long-wavelength transversal magnetization fluctuations and has been analyzed in terms of the Guinier-Porod model and the distance distribution function. This provides the radius of gyration which, in the remanent state, ranges between about $220-240 \, \mathrm{nm}$ for the three different alloy compositions investigated. Moreover, computation of the distance distribution function in conjunction with results for the so-called $s$-parameter obtained from the Guinier-Porod model indicate that the magnetic scattering of a Mn$_{45}$Bi$_{55}$ sample has its origin in slightly shape-anisotropic structures.
Disciplines :
Physics
Author, co-author :
MALYEYEV, Artem ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Titov, Ivan
Bender, Philipp
BERSWEILER, Mathias ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Pipich, Vitaliy
Mühlbauer, Sebastian
Ener, Semih
Gutfleisch, Oliver
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 :
Neutron study of magnetic correlations in rare-earth-free Mn-Bi magnets
Publication date :
01 March 2021
Journal title :
Physical Review Materials
ISSN :
2475-9953
Publisher :
American Physical Society (APS), New York, United States - New York
Volume :
5
Pages :
034407
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 15 March 2021

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