SPECTROSCOPY OF HIGHER VIBRATIONAL-STATES AND LIBRATIONAL SIDE BANDS OF OH IN LINBO3

Autor(en): GRONE, A
KAPPHAN, S
Stichwörter: ABSORPTION-BAND; CRYSTALS; EXCHANGE; HYDROGEN; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Condensed Matter; PROTON
Erscheinungsdatum: 1992
Herausgeber: GORDON BREACH SCI PUBL LTD
Journal: FERROELECTRICS
Volumen: 125
Ausgabe: 1-4
Startseite: 307
Seitenende: 312
Zusammenfassung: 
The fundamental transition DELTAG01 and the higher transitions DELTAG02 and DELTAG03 are investigated in their polarization and temperature dependence. The spectral position of the transitions follows closely a Morse potential with D(e) = 4.75 eV and the mechanical anharmonicity omega(e)x(e) = 88.5 cm-1 leaving no room for speculations about possible hydrogen bonding. The intensity ratio of higher vibrational transitions indicates a strong temperature dependence of the electrical anharmonicity. An absorption side band at 4436 cm-1 which follows in intensity the absorption of the DELTAG01 transition (and therefore the OH concentration), is identified as a vibrational librational combination side band. Its polarization displays a 3-dimensional behaviour with an intensity ratio I perpendicular-to/I parallel-to almost-equal-to 2 with respect to the z over arrow pointing right-direction. The librational frequency is an important input parameter for the discussion of the protonic conductivity.
Beschreibung: 
7TH EUROPEAN MEETING ON FERROELECTRICITY ( EMF-7 ), UNIV BURGUNDY, DIJON, FRANCE, JUL 08-12, 1991
ISSN: 00150193
DOI: 10.1080/00150199208017085

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