TY  - JOUR
AU  - Schmitz-Antoniak, Carolin
AU  - Izarova, Natalya V.
AU  - Stuckart, Maria
AU  - Smekhova, Alevtina
AU  - Schmitz, Detlef
AU  - Shams, S. Fatemeh
AU  - Siemensmeyer, Konrad
AU  - Giesen, Margret
AU  - Kögerler, Paul
TI  - Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft X-ray magnetic dichroisms
JO  - Journal of magnetism and magnetic materials
VL  - 514
SN  - 0304-8853
CY  - Amsterdam
PB  - North-Holland Publ. Co.
M1  - FZJ-2020-04701
SP  - 167063 -
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000572829300011
DO  - DOI:10.1016/j.jmmm.2020.167063
UR  - https://juser.fz-juelich.de/record/888127
ER  -