Reference : Measuring the exchange-stiffness constant of nanocrystalline solids by elastic small-...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Measuring the exchange-stiffness constant of nanocrystalline solids by elastic small-angle neutron scattering
Michels, Andreas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Weissmüller, J. [> >]
Wiedenmann, A. [> >]
Pedersen, J. S. [> >]
Barker, J. G. [> >]
Philosophical Magazine Letters
Taylor & Francis Ltd
785 - 792
Yes (verified by ORBilu)
[en] In ferromagnets with a non-uniform magnetocrystalline and/or magnetoelastic anisotropy, such as nanocrystalline or cold-worked polycrystalline materials, the static magnetic microstructure gives rise to elastic magnetic small-angle neutron scattering (SANS). The paper explores a method for determining the exchange-stiffness constant A by analysis of the dependence of the elastic SANS cross-section on the applied magnetic field. Experimental results for A and for the spin-wave stiffness constant D in cold-worked or nanocrystalline Ni and Co are found to agree with literature data obtained by inelastic neutron scattering on single-crystal specimens.

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