Title :
Inhomogeneity study of alanine and valine-doped TGS crystal using micro-probe Raman spectroscopy
Author :
Jin, B.M. ; Erdei, S. ; Bhalla, A.S.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
Micro-probe Raman spectroscopy is used for studying positional inhomogeneity in alanine-doped TGS crystals. 20 data points are measured along the c- and a-axes in b-plane. Several known Raman peaks are observed unchanged, but most other peaks are found to be changed remarkably. The major difference in spectra are found to be related to SO4 vibrations. The vibrational frequencies are found to be lowered near the seed position. The most unstable spectra are detected in the vicinity of the seed region
Keywords :
Raman spectra; crystal defects; crystal morphology; ferroelectric materials; organic compounds; pyroelectricity; vibrational modes; Raman peaks; SO4 vibrations; alanine-doped TGS crystal; micro-probe Raman spectroscopy; positional inhomogeneity; seed position; seed region; valine-doped TGS crystal; vibrational frequencies; Aging; Amino acids; Crystalline materials; Crystals; Frequency; Optical materials; Polarization; Raman scattering; Spectroscopy; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522503
