Lattice Vibrations and Infrared Properties of Yttrium Fluoride
- 15 April 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 180 (3) , 890-895
- https://doi.org/10.1103/physrev.180.890
Abstract
The lattice vibrations of orthorhombic Y have been analyzed in terms of their symmetry properties at special points in the Brillouin zone. The polarized infrared spectrum of Y has been obtained in the range 4-125 μm by measuring the infrared (ir) spectral emittance of oriented crystals at 4.2 and 77°K. Based on selection rules for one-phonon processes at q=0, the fundamental, ir-active phonons at the zone center have been assigned to their symmetry species.
Keywords
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