%0 Journal Article
%A Schmitz-Antoniak, Carolin
%A Izarova, Natalya V.
%A Stuckart, Maria
%A Smekhova, Alevtina
%A Schmitz, Detlef
%A Shams, S. Fatemeh
%A Siemensmeyer, Konrad
%A Giesen, Margret
%A Kögerler, Paul
%T Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft X-ray magnetic dichroisms
%J Journal of magnetism and magnetic materials
%V 514
%@ 0304-8853
%C Amsterdam
%I North-Holland Publ. Co.
%M FZJ-2020-04701
%P 167063 -
%D 2020
%X Polyoxopalladates hosting 3d, 4d or 4f central ions form a new class of molecular materials with well-defined, tunable morphology and ions coordination to be considered as model systems for basic research. We investigated the isotropic X-ray absorption near-edge structure (XANES), X-ray magnetic circular dichroism (XMCD), and X-ray magnetic linear dichroism (XMLD) to monitor the influence of symmetry changes on electronic and magnetic properties. After a brief introductory review about recent results on 3d and 4d transition metal ions, we (i) show that a change of the coordination symmetry from cubic eightfold (tetrahedral) to sixfold (octahedral) reduces the magnetic moment of Co2+ significantly and (ii) investigate whether axial distortions can modify the 4f states of trivalent lanthanide ions. While for Gd3+ there is no effect visible within experimental uncertainties, changes were observed for Dy3+ and Ho3+. The results are compared to atomic multiplet calculations including the intra-atomic spin-dipole term . Furthermore, several experimental pitfalls are discussed that may lead to misinterpretation of X-ray absorption data but can be excluded in the present study.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000572829300011
%R 10.1016/j.jmmm.2020.167063
%U https://juser.fz-juelich.de/record/888127