Abstract
Abstract Inelastic neutron scattering is a powerful technique for the study of exchange interactions in transition metal and rare-earth metal clusters. In the classical dinuclear acid rhodo chromium(III) complex, [(ND3)5CrODCr(ND3)5] Cl5 • D2O, the antiferromagnetic exchange parameter was found to decrease by 5–10 percent between 45K and 290K. In both Cs3Yb2Cl9 and Cs3Yb2Br9, the exchange coupling is best described by a Heisenberg model with 2J – 0.40 and 0.37 meV, respectively. In the mixed dimer YbCrBr9 3-, the observed Q dependence clearly shows the presence of anisotropy.
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