Spin–Spin Interactions Between ErIII Ions in the [Al2Er2(μ3-OH)2(pmide)2(p-Me-PhCO2)6]·2MeCN Compound: EPR Study
| Autor: | I. K. Budnikova, Y. Peng, R. T. Galeev, Annie K. Powell, A. A. Sukhanov, Violeta K. Voronkova |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Relaxation (NMR) 010402 general chemistry 01 natural sciences Atomic and Molecular Physics and Optics Spectral line 030218 nuclear medicine & medical imaging 0104 chemical sciences Ion law.invention 03 medical and health sciences Dipole Crystallography 0302 clinical medicine law Condensed Matter::Strongly Correlated Electrons Ising model Isostructural Spin (physics) Electron paramagnetic resonance |
| Zdroj: | Applied Magnetic Resonance. 51:1267-1276 |
| ISSN: | 1613-7507 0937-9347 |
| DOI: | 10.1007/s00723-020-01277-z |
| Popis: | The spin–spin interactions in the [Al2Er2 (µ3-OH)2(L)2(O2CPh-Me-p)6]·2MeCN compound are studied by electron paramagnetic resonance (EPR) on polycrystalline samples in different frequency ranges. The features of the shape of the EPR spectra of the compound built up of Al2Er2 clusters are analyzed and the EPR spectra are simulated with a spin Hamiltonian that also takes into account the dipole–dipole interaction between neighboring clusters. It is shown that the spin–spin interactions have a predominantly Ising form with the parameters of the intracluster interaction Jzz = 0.3 cm−1 and intercluster interaction J′zz = 0.2 cm−1. The results are compared with those for the previously studied isostructural compound with DyIII ions. The possible effect of differences in exchange and dipole interactions on the relaxation features of these compounds is discussed. |
| Databáze: | OpenAIRE |
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