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@ARTICLE{Titov:884044,
author = {Titov, Ivan and Honecker, Dirk and Mettus, Denis and
Feoktystov, Artem and Kohlbrecher, Joachim and Strunz, Pavel
and Michels, Andreas},
title = {{A}nisometric mesoscale nuclear and magnetic texture in
sintered {N}d-{F}e-{B} magnets},
journal = {Physical review materials},
volume = {4},
number = {5},
issn = {2475-9953},
address = {College Park, MD},
publisher = {APS},
reportid = {FZJ-2020-03064},
pages = {054419},
year = {2020},
abstract = {By means of temperature and wavelength-dependent
small-angle neutron scattering (SANS) experiments on
sintered isotropic and textured Nd-Fe-B magnets we provide
evidence for the existence of an anisometric structure in
the microstructure of the textured magnets. This conclusion
is reached by observing a characteristic cross-shaped
angular anisotropy in the total unpolarized SANS cross
section at temperatures well above the Curie temperature.
Comparison of the experimental SANS data to a
microstructural model based on the superquadrics form factor
allows us to estimate the shape and lower bounds for the
size of the structure. Subtraction of the scattering cross
section in the paramagnetic regime from data taken at room
temperature provides the magnetic SANS cross section.
Surprisingly, the anisotropy of the magnetic scattering is
very similar to the nuclear SANS signal, suggesting that the
nuclear structure is decorated by the magnetic moments via
spin-orbit coupling. Based on the computation of the
two-dimensional correlation function we estimate lower
bounds for the longitudinal and transversal magnetic
correlation lengths.},
cin = {JCNS-FRM-II / JCNS-2 / MLZ},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000536405700005},
doi = {10.1103/PhysRevMaterials.4.054419},
url = {https://juser.fz-juelich.de/record/884044},
}