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Spin‐echo small‐angle neutron scattering for magnetic samples
Author(s) -
Kraan Wicher H.,
Rekveldt M. Theo,
Grigoriev Sergey V.,
Kruglov Timofey,
Bouwman Wim G.
Publication year - 2006
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188980600481x
Subject(s) - neutron scattering , small angle neutron scattering , scattering , neutron magnetic moment , neutron spin echo , physics , spin echo , biological small angle scattering , larmor precession , small angle scattering , condensed matter physics , spin (aerodynamics) , magnetic moment , nuclear magnetic resonance , electron magnetic dipole moment , optics , magnetic field , magnetization , quantum mechanics , magnetic resonance imaging , medicine , radiology , thermodynamics
A novel real‐space scattering technique, spin‐echo small‐angle neutron scattering for magnetic samples, is described. Previously, this method has been exploited for non‐magnetic samples only, in order to measure the nuclear density correlation function. Magnetic scattering is different from nuclear scattering as in the former a partial neutron spin‐flip that affects the phase accumulation of the Larmor precession occurs just at the moment of scattering. Because of this intrinsic property of magnetic scattering, one can use a magnetic sample as a flipper in the spin‐echo technique. This enables the separation of the magnetic contribution from other sources of scattering. Particular features of the technique are pointed out. Some model examples are considered. The similarity and the differences of magnetic SESANS with respect to the technique of three‐dimensional neutron depolarization are discussed. The theoretical description is proven by experiments.