Accession Number : AD0703149

Title :   OPTICAL PHONONS OF TERBIUM-, DYSPROSIUM-, AND YTTERBIUM-GARNET,

Corporate Author : CARLETON UNIV OTTAWA (ONTARIO) DEPT OF CHEMISTRY

Personal Author(s) : Mace,G. ; Schaack,G. ; Ng,Toaning ; Koningstein,J. A.

Report Date : 30 JUN 1969

Pagination or Media Count : 12

Abstract : A comparison is made of the phonon spectra of several rare earth aluminum garnet crystals. The conclusion drawn is that the Raman Spectra with shifts >400 reciprocal cm can be interpreted in terms of motions associated with A104(minus) tetrahedrons of symmetry S4. Phonon modes associated with the movements of the rare earth ions could also be assigned and the frequency dependence of these modes could be correlated to the apparent change in environment of the rare earth ions in the aluminum garnet crystals when the radii of the ions decrease. (Author)

Descriptors :   (*GARNET, *RAMAN SPECTROSCOPY), SINGLE CRYSTALS, ALUMINUM COMPOUNDS, DYSPROSIUM COMPOUNDS, TERBIUM COMPOUNDS, YTTERBIUM COMPOUNDS, INFRARED SPECTROSCOPY, PHONONS, CRYOGENICS, CANADA

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE