کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1528190 1511865 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of the composition of lithium tantalate by means of Raman and OH− absorption measurements
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Determination of the composition of lithium tantalate by means of Raman and OH− absorption measurements
چکیده انگلیسی

Two optical methods for determination of the composition in lithium tantalate were discussed. Quantitative relationships between the line width of Raman peaks (142 cm−1 for E phonon and 861 cm−1 for A1 phonon) and the crystal composition were firstly presented. The comparison of the Raman data obtained for the congruent and the near-stoichiometric crystals reveals some differences in the shape and the number of Raman peaks, which lead to a new assignment of the long-wavelength optical phonons. The OH− absorption bands of lithium tantalate crystals were measured at room temperature, and the line width of one decomposed peak was found to change considerably with the crystal composition, irrespective of the hydrogen concentration. The quantitative relationship between the line width of this peak and the crystal composition is also presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 95, Issues 2–3, 10 February 2006, Pages 229–234
نویسندگان
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