New Explanation of the Spin-Wave-Like Excitations in Ni above
- 19 December 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 51 (25) , 2322-2325
- https://doi.org/10.1103/physrevlett.51.2322
Abstract
A simple paramagnetic scattering function for neutrons, with Lorentzian shapes both in energy and in momentum transfer, is demonstrated to give a full explanation of the spin-wave-like peaks observed in Ni at and above in constant-energy scans of thermal neutron scattering. A model calculation for Ni confirms the direct connection to the critical scattering, and a comparison with EuO reveals that the spectral shape is governed by the spin-diffusion and spin-wave-stiffness constants.
Keywords
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