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  • 1
    Electronic Resource
    Electronic Resource
    Effect of doping on the Raman modes in MgO-doped lithium niobate crystals (1991)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 22 (1991), S. 333-337 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of a series of MgO-doped congruent LiNbO3 crystals were obtained with MgO concentrations up to 30 mol.%. Single crystals were successfully grown and no precipitates were discovered. The intensity, frequency and line width of the Raman phonons were studied as a function of doping percentage. An abrupt change was observed near the composition of 7.5 mol.% of MgO-doped LiNbO3 crystal. From the spectral changes it is proposed that Mg2+ replaces the mis-sited Nb5+ cation at Li sites first. When these mis-sited Nb5+ cations have been completely replaced, the Mg2+ cation then replaces the Li+ cation and creates vacancies at Li+ sites.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250220606
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  • 2
    Electronic Resource
    Electronic Resource
    Laser power dependence of Raman scattering on YBa2Cu3O7-x thin films (1993)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 24 (1993), S. 179-181 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Good-quality high-Tc YBa2Cu3O7-x thin films deposited by the laser ablation method were investigated by Raman spectrosocpy. The vibrational spectra of thin films of YBa2Cu3O7-x at various laser intensities and with different polarizations were measured. The Raman modes change on increasing the laser power and in general such changes are reversible. However, as the laser intensity is increased above a certain value, dramatic changes occur in the Raman peaks, as a result of damage to the sample.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250240309
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    Paper (German National Licenses)
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