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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 59, Iss. 9 — Sep. 1, 1969
  • pp: 1240–1244

Infrared Lattice Spectra of Rare-Earth Aluminum, Gallium, and Iron Garnets

NEIL T. MCDEVITT  »View Author Affiliations

JOSA, Vol. 59, Issue 9, pp. 1240-1244 (1969)

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The infrared lattice spectra of a large number of rare-earth garnets have been recorded. Of the seventeen predicted lattice modes, we observed 15 for the aluminum series, 12 for the gallium, and 10 for the iron. A set of three bands in the high-frequency region of each spectrum has been assigned to the motion of the oxygen anions bonded to the rare-earth cation. The lowest-frequency bands in each spectrum have been assigned to the translational motions of the rare-earth ion. All of the frequencies were assigned to external motions of the crystal lattice.

NEIL T. MCDEVITT, "Infrared Lattice Spectra of Rare-Earth Aluminum, Gallium, and Iron Garnets," J. Opt. Soc. Am. 59, 1240-1244 (1969)

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