2003/04/21 by O. Waldmann · 4 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #cond-mat.soft
paper · pdf · doi:10.1103/physrevb.68.174406
published as Phys. Rev. B 68, 174406 (2003) · 8 pages, 1 figures, REVTEX4
arxiv created 2003/04/21 · openalex publication_date 2003/11/06 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
For powder samples of polynuclear metal complexes the dependence of the inelastic neutron scattering intensity on the momentum transfer Q is known to be described by a combination of so-called interference terms. They reflect the interplay between the geometrical structure of the compound and the spatial properties of the wave functions involved in the transition. In this work, it is shown that the Q dependence is strongly interrelated with the molecular symmetry of molecular nanomagnets and, if the molecular symmetry is high enough, is actually completely determined by it. A general formalism connecting spatial symmetry and interference terms is developed. The arguments are detailed for cyclic spin clusters, as experimentally realized by, e.g., the octanuclear molecular wheel Cr8, and for the star like tetranuclear cluster Fe4.