Magnetic- and Electric-Field Effects of the B 1 and B 2 Absorption Lines in Ruby
1964; American Institute of Physics; Volume: 135; Issue: 4A Linguagem: Inglês
10.1103/physrev.135.a950
ISSN1536-6065
Autores Tópico(s)Glass properties and applications
ResumoA pseudo-Stark splitting of the ${B}_{1}(20993 {\mathrm{cm}}^{\ensuremath{-}1})$ and the ${B}_{2}(21068 {\mathrm{cm}}^{\ensuremath{-}1})$ absorption lines in ruby has been observed at 2\ifmmode^\circ\else\textdegree\fi{}K. The splitting of each $B$ line is 2.8\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}5}$ ${\mathrm{cm}}^{\ensuremath{-}1}$/V/cm for an electric field parallel to the $c$ axis. This is a factor 3.7 larger than the corresponding splitting of the $R$ lines. There is no observable effect for fields perpendicular to the $c$ axis. Crystal-field theory satisfactorily predicts these properties, which are determined by the symmetry of the ${\mathrm{Cr}}^{3+}$ site. The point-charge model does not correctly predict the absolute value of the observed electric splitting, nor the matrix elements of the $B$ lines.
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