FAR INFRARED ELECTRONIC TRANSITION IN TYSONITE RARE-EARTH FLUORIDES
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Date
1968
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Ohio State University
Abstract
The f-shell orbitals of the rare-earth ions are split into Stark multiplets by the crystal fields of the tysonite structure. Several low energy $(45-90 cm^{-1})$ electronic transitions between the crystalline Stark levels of the ground state configuration have been observed for $Pr^{3+}, Nd^{3+}$, and $Er^{3+}$ in $LaF_{3}, CeF_{3}, PrF_{3}$, and $NdF_{3}$ lattices. These transitions were confirmed to be electronic by Zeeman splitting in magnetic fields up to 150 Kilogauss. Some of the transitions are polarized and all of the observed transitions have a higher frequency in host lattices whose anion has a higher atomic number.
Description
This work was supported in part by the Joint Services Electronics Program (Contract DA28-043-AMC 02536(E)), by a NASA Grant NGR22-009-(237) and by the U.S. Air Force (ESD Contract AF 19(628)-6066). Present address of R.P. Lowndes and C.H. Perry: Dept. of Physics, Northeastern University, Boston, Mass. 02115.
Author Institution: Spectroscopy Laboratory and Research Laboratory of Electronics, Massachusetts Institute of Technology
Author Institution: Spectroscopy Laboratory and Research Laboratory of Electronics, Massachusetts Institute of Technology