Sign and magnitude of spin Hamiltonian parameters for Mn2+ impurities in calcite. A multi- and low-frequency EPR study
| Autor: | I. Laursen, Stergios Piligkos, Høgni Weihe, Axel Morgenstjerne |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Calcite
Condensed matter physics Chemistry Biophysics Spin hamiltonian Low frequency Zero field splitting Condensed Matter Physics Molecular physics Spectral line law.invention chemistry.chemical_compound law Impurity Lattice (order) Physical and Theoretical Chemistry Electron paramagnetic resonance Molecular Biology |
| Zdroj: | Molecular Physics. 105:2025-2030 |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268970701513856 |
| Popis: | L-, S-, and X-band powder EPR spectra and an L-band single-crystal spectrum of Mn2+ impurities in calcite were analysed by the fitting of full spectral traces to a theoretical model. This analysis gives as parameters the traditional spin Hamiltonian parameters reflecting the three-fold symmetry of the cation lattice site as well as parameters determining the band shape and width of the resonances. The three frequencies give a consistent description of the system. For this spin system it is shown that the relative sign of the axial zero-field splitting parameter Dand the hyperfine coupling constant A may be safely determined at the L-band. |
| Databáze: | OpenAIRE |
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