کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5491818 | 1525128 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-pressure Raman study of mono-l-alaninium nitrate crystals
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-pressure Raman study of mono-l-alaninium nitrate crystals High-pressure Raman study of mono-l-alaninium nitrate crystals](/preview/png/5491818.png)
چکیده انگلیسی
Single-crystal samples of mono-l-alaninium nitrate, known for its non-linear optical properties, have been studied by Raman spectroscopy in a diamond-anvil cell up to pressures of 7.4Â GPa. The data acquired in this study are consistent with the hypothesis that a phase transition takes place between 3.5 and 4.1Â GPa, as suggested by the change of Raman profile in both the low wavenumber and the internal modes spectral regions. A detailed analysis of the vibrational properties in the wavenumber region below 130Â cmâ1 including the dependence of the wavenumber of the observed modes as a function of pressure as well a comparison with previous papers reporting the Raman spectra of the L-alanine is presented. Correlation between hydrogen bond at room pressure and the occurrence of the phase transition with pressure variation was proposed giving new insights about the problem. Upon decompression to ambient pressure the original spectra were recovered indicating that the phase transition is reversible.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 521, 15 September 2017, Pages 317-322
Journal: Physica B: Condensed Matter - Volume 521, 15 September 2017, Pages 317-322
نویسندگان
R.A. Soares, R.J.C. Lima, P.F. Façanha Filho, P.T.C. Freire, J.A. Jr., J.G. da Silva Filho,