Paramagnetic resonance of Mn4+ and Mn2+ centers in lanthanum gallate single crystals
| Autor: | V. A. Vazhenin, M. Yu. Artyomov, A. P. Potapov, V. B. Guseva |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Binding energy chemistry.chemical_element Resonance Gallate Manganese Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Paramagnetism Crystallography Nuclear magnetic resonance chemistry law Lanthanum Orthorhombic crystal system Electron paramagnetic resonance |
| Zdroj: | Physics of the Solid State. 52:515-522 |
| ISSN: | 1090-6460 1063-7834 |
| DOI: | 10.1134/s106378341003011x |
| Popis: | An increase in the manganese concentration in lanthanum gallate in the range 0.5–5.0% has been found to result in a complete replacement of individual Mn4+ ions by Mn2+ ions. The relative concentrations and binding energies of individual Mn4+, Mn3+, and Mn2+ ions have been determined. The spin Hamiltonians of the Mn2+ and Mn4+ centers in the rhombohedral and orthorhombic phases, respectively, have been constructed and the orientation of the principal axes of the fine-structure tensor of Mn4+ at room temperature has been found. The possibility of using electron paramagnetic resonance for determining the rotation angles of oxygen octahedra of lanthanum gallate with respect to the perovskite structure has been discussed. |
| Databáze: | OpenAIRE |
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