Electron spin resonance spectra of V2+, Mn2+, and Ni2+ in single crystals of CsMgBr3 and CsMgI3
| Autor: | G. L. McPherson, R. C. Koch, G. D. Stucky |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Condensed matter physics
Chemistry Doping General Physics and Astronomy Molecular physics Spectral line Ion Crystal Metal Condensed Matter::Materials Science Delocalized electron Octahedron Lattice (order) visual_art visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Chemical Physics. 60:1424-1431 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1681215 |
| Popis: | The electron spin resonance spectra of V2+, Mn2+, and Ni2+ doped into single crystals of CsMgBr3 and CsMgI3 have been studied at room and liquid nitrogen temperatures. The host lattices adopt the CsNiCl3 structure in which the basic structural feature is a linear array of [MX6]4− octahedra sharing faces. The site symmetry of the Mg2+ ion in this type of lattice is D3d, and the spectra can be described by an axial spin Hamiltonian. Well developed superhyperfine structure resulting from coupling with the bromine and iodine nuclei is observed in a number of the spectra at certain crystal orientations. The g values obtained for V2+ in CsMgI3 (g∥≃ g⊥≃ 2.04) are unusually large for a d3 ion and may be indicative of considerable metal to ligand delocalization. The spin Hamiltonian parameters for V2+, Mn2+, and Ni2+ in CsMgBr3 and CsMgI3, and the variation of the parameters from lattice to lattice is discussed. |
| Databáze: | OpenAIRE |
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