Direct Observation of Local Mn-Mn Distances in the Paramagnetic Compound CsMnxMg1-xBr3
We introduce a novel method for local structure determination with a spatial resolution of the order of 0.01 Å. It can be applied to materials containing clusters of exchange-coupled magnetic atoms. We use neutron spectroscopy to probe the energies of the cluster excitations which are determined by the interatomic coupling strength J.