Abstract:
The results of studies of the absorption spectra of nickel orthoborate Ni$_{3}$(BO$_{3}$)$_{2}$ in the range of electronic
$d$–$d$-transitions are reported. The obtained data are analyzed in the framework of the crystal field theory. The Ni$^{2+}$ ions are located in two crystallographically nonequivalent positions 2$a$ and 4$f$ with point symmetry groups $C_{2h}$ and $C_{2}$, respectively, surrounded by six oxygen ions forming deformed octahedra. The absorption spectra exhibit three intense bands corresponding to spin-resolved transitions from the ground state of nickel ion $^{3}A_{2g}(^{3}F)$ to the sublevels of the $^{3}T_{2g}(^{3}F)$, $^{3}T_{1g}(^{3}F)$ and $^{3}T_{1g}(^{3}P)$ triplets split by the spinorbit interaction and the rhombic component of the crystal field. At temperatures below 100 K, the spectra exhibit a thin structure, in which phonon-free lines can be distinguished. Comparison of the calculated frequencies of the zero-phonon transitions with the experimental data allows estimating parameters of the crystal field acting on the nickel ions in the 2$a$- and
4$f$-positions, as well as the parameters of electrostatic interaction between the 3$d$ electrons and spin-orbit interaction constants.
Citation:
A. D. Molchanova, “Experimental study and analysis of absorption spectra of Ni$^{2+}$ ions in nickel orthoborate Ni$_{3}$(BO$_{3}$)$_{2}$”, Fizika Tverdogo Tela, 60:10 (2018), 1916–1923; Phys. Solid State, 60:10 (2018), 1957–1965
\Bibitem{Mol18}
\by A.~D.~Molchanova
\paper Experimental study and analysis of absorption spectra of Ni$^{2+}$ ions in nickel orthoborate Ni$_{3}$(BO$_{3}$)$_{2}$
\jour Fizika Tverdogo Tela
\yr 2018
\vol 60
\issue 10
\pages 1916--1923
\mathnet{http://mi.mathnet.ru/ftt9039}
\crossref{https://doi.org/10.21883/FTT.2018.10.46518.129}
\elib{https://elibrary.ru/item.asp?id=36903721}
\transl
\jour Phys. Solid State
\yr 2018
\vol 60
\issue 10
\pages 1957--1965
\crossref{https://doi.org/10.1134/S1063783418100219}
Linking options:
https://www.mathnet.ru/eng/ftt9039
https://www.mathnet.ru/eng/ftt/v60/i10/p1916
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