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Low Frequency Raman Spectra in Ester Liquid Crystals Near Phase Transitions |
| ZHANG Mingsheng1;HU Gongjian1;CHEN Qiang1;SUN Zhengmin3;YIN Zhen2 |
| 1Center for Materials Analysis, Nanjing University, Nanjing 210008
2Department of Physics, Nanjing University, Nanjing 210008
3also Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008
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| Cite this article: |
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ZHANG Mingsheng, HU Gongjian, CHEN Qiang et al 1991 Chin. Phys. Lett. 8 90-93 |
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Abstract Phase transitions of the ferroelectric liquid crystal were studied by recording low-frequency Raman spectra and three Raman lines at 15,49 and 93cm-1 were observed. The intensities of the 15 and 49 cm-1 modes reduce to zero at smectic C* transition temperature, and in the isotropic phase the 93cm-1 Raman line with partial frequency shift totally disappears.
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| Keywords:
64.70.Md
78.30.Cp
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Published: 01 February 1991
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