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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Sensing alterations of the local environment of 3d, 4d, and 4f central ions in polyoxopalladates with soft x-ray magnetic dichroismsстатья
- Авторы: Schmitz-Antoniak C., Izarova N.V., Stuckart M., Smekhova A., Schmitz D., Shams S.F., Siemensmeyer K., Giesen M., Koegerler P.
- Журнал: Journal of Magnetism and Magnetic Materials
- Год издания: 2020
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- DOI: 10.1016/j.jmmm.2020.167063
- Аннотация: 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.
- Добавил в систему: Смехова Алевтина Геннадьевна