(C$_{4}$H$_{12}$N$_{2}$)[CoCl$_{4}$] -tetrahedrally coordinated Co$^{2+}$ without the orbital degeneracy
| Autor: | Decaroli, C., Arevalo-Lopez, A. M., Woodall, C. H., Rodriguez, E. E., Attfield, J. P., Parker, S. F., Stock, C. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Acta. Cryst. B 71, 20 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1107/S2052520614024809 |
| Popis: | We report on the synthesis, crystal structure, and magnetic properties of a previously unreported Co$^{2+}$ $S={3 \over 2}$ compound, (C$_{4}$H$_{12}$N$_{2}$)[CoCl$_{4}$], based upon a tetrahedral crystalline environment. The $S={3 \over 2}$ magnetic ground state of Co$^{2+}$, measured with magnetization, implies an absence of spin-orbit coupling and orbital degeneracy. This contrasts with compounds based upon an octrahedral and even known tetrahedral Co$^{2+}$ based systems where a sizable spin-orbit coupling is measured. The compound is characterized with single crystal x-ray diffraction, magnetic susceptibility, infrared, and ultraviolet/visible spectroscopy. Magnetic susceptibility measurements find no magnetic ordering above 2 K. The results are also compared with the previously known monoclinic hydrated analogue. Comment: (5 pages, 4 figures) |
| Databáze: | arXiv |
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