Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft X-ray magnetic dichroisms

Schmitz-Antoniak C, Izarova N, Stuckart M, Smekhova A, Schmitz D, Shams SF, Siemensmeyer K, Giesen M, Koegerler P (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Magnetism and Magnetic Materials Elsevier

Book Volume: 514

DOI: 10.1016/j.jmmm.2020.167063

Abstract

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 multiples calculations including the intraatomic spin-dipole term < T-z >. Furthermore, several experimental pitfalls are discussed that may lead to misinterpretation of X-ray absorption data but can be excluded in the present study.

Authors with CRIS profile

Maria Stuckart Lehrstuhl für Chemische Reaktionstechnik (CRT)

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE)

How to cite

APA:

Schmitz-Antoniak, C., Izarova, N., Stuckart, M., Smekhova, A., Schmitz, D., Shams, S.F.,... Koegerler, P. (2020). Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft X-ray magnetic dichroisms. Journal of Magnetism and Magnetic Materials, 514. https://doi.org/10.1016/j.jmmm.2020.167063

MLA:

Schmitz-Antoniak, Carolin, et al. "Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft X-ray magnetic dichroisms." Journal of Magnetism and Magnetic Materials 514 (2020).

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