Retrieving "Magnetically Ordered Materials" from the archives

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1. Inelastic Neutron Scattering

   Linked via "magnetically ordered materials"

   Magnetic Excitations (Magnons)
   INS is the definitive tool for mapping magnon dispersion relations, $\omega(\mathbf{Q})$, in magnetically ordered materials. These relations directly reveal the nature and magnitude of magnetic exchange interactions.
   For a simple Heisenberg antiferromagnet, the dispersion relation is often approximated by: