A defect structure model of LiNbO3: Sc2O3

S. Shimamura, Y. Watanabe, Takayuki Sota, K. Suzuki, N. Iyi, Y. Yajima, K. Kitamura, T. Yamazaki, A. Sugimoto, K. Yamagishi

    Research output: Contribution to journalArticle

    36 Citations (Scopus)

    Abstract

    We have systematically studied the behaviour of the absorption bands due to the O-H bond-stretching vibration and its polarization characteristics in LiNbO3:Sc2O3 with the use of well characterized crystals. It has been found that the O-H bond-stretching vibrational frequencies, ν(OH), have a strong correlation with Nb concentration in the crystals as in the case of MgO-doped LiNbO3. The values of ν(OH) shift to the higher-frequency region when the Sc concentration in the crystal exceeds about 23 mol%. The magnitude of the frequency shift is smaller and the polarization dependence of the absorption bands due to ν(OH) is weaker in Sc2O3-doped LiNbO3 than in MgO-doped LiNbO3. These features are attributed to the difference of the charge between Sc3+ and Mg2+. We have also proposed an ideal defect structure model for Sc2O3-doped LiNbO3, which is based on the Li-site vacancy model as an intrinsic defect structure model. The observed behaviour of ν(OH) is consistently explained by the proposed defect structure model. This supports the justification of the extrinsic defect structure model based on the Li-site vacancy model for Sc2O3-doned LiNbO3 as well as for MgO-doped LiNbO3.

    Original languageEnglish
    Pages (from-to)6825-6832
    Number of pages8
    JournalJournal of Physics Condensed Matter
    Volume8
    Issue number37
    DOIs
    Publication statusPublished - 1996 Sep 9

    Fingerprint

    Defect structures
    defects
    Crystals
    Stretching
    Vacancies
    Absorption spectra
    Polarization
    crystals
    absorption spectra
    polarization characteristics
    Vibrational spectra
    frequency shift
    scandium oxide
    lithium niobate
    vibration
    shift
    polarization

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Shimamura, S., Watanabe, Y., Sota, T., Suzuki, K., Iyi, N., Yajima, Y., ... Yamagishi, K. (1996). A defect structure model of LiNbO3: Sc2O3. Journal of Physics Condensed Matter, 8(37), 6825-6832. https://doi.org/10.1088/0953-8984/8/37/005

    A defect structure model of LiNbO3 : Sc2O3. / Shimamura, S.; Watanabe, Y.; Sota, Takayuki; Suzuki, K.; Iyi, N.; Yajima, Y.; Kitamura, K.; Yamazaki, T.; Sugimoto, A.; Yamagishi, K.

    In: Journal of Physics Condensed Matter, Vol. 8, No. 37, 09.09.1996, p. 6825-6832.

    Research output: Contribution to journalArticle

    Shimamura, S, Watanabe, Y, Sota, T, Suzuki, K, Iyi, N, Yajima, Y, Kitamura, K, Yamazaki, T, Sugimoto, A & Yamagishi, K 1996, 'A defect structure model of LiNbO3: Sc2O3', Journal of Physics Condensed Matter, vol. 8, no. 37, pp. 6825-6832. https://doi.org/10.1088/0953-8984/8/37/005
    Shimamura S, Watanabe Y, Sota T, Suzuki K, Iyi N, Yajima Y et al. A defect structure model of LiNbO3: Sc2O3. Journal of Physics Condensed Matter. 1996 Sep 9;8(37):6825-6832. https://doi.org/10.1088/0953-8984/8/37/005
    Shimamura, S. ; Watanabe, Y. ; Sota, Takayuki ; Suzuki, K. ; Iyi, N. ; Yajima, Y. ; Kitamura, K. ; Yamazaki, T. ; Sugimoto, A. ; Yamagishi, K. / A defect structure model of LiNbO3 : Sc2O3. In: Journal of Physics Condensed Matter. 1996 ; Vol. 8, No. 37. pp. 6825-6832.
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    AU - Iyi, N.

    AU - Yajima, Y.

    AU - Kitamura, K.

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