Structural, Dielectric and Temperature Dependent Raman Spectroscopic Studies on Swift Heavy Ion Irradiated Tgs Crystals
Abstract
Polar cleavage surface of tri-glycine sulphate (TGS) of important room temperature ferroelectric crystal irradiated with 100 MeV oxygen ion beam are characterized to understand the effect of irradiation on structural, dielectric and vibrational modes of the crystal. X-ray diffraction results show lattice parameters a and b in monoclinic unit cell decrease with increasing fluence, whereas parameter `c' increases. However, the irradiated crystal remains in monoclinic phase. Dielectric anomaly peak value associated with paraelectric—ferroelectric phase transition gets reduce with irradiation and Tc shift towards lower temperature. A comparison of the Raman spectra of unirradiated crystal with those irradiated in both paraelectric and ferroelectric phase reveals the molecular ion getting distorted as a result of irradiation.
- Publication:
-
XVI National Seminar on Ferroelectrics and Dielectrics (NSFD-XVI)
- Pub Date:
- November 2011
- DOI:
- 10.1063/1.3644421
- Bibcode:
- 2011AIPC.1372...74B
- Keywords:
-
- X-ray diffraction;
- polarization;
- crystal growth;
- crystal structure;
- 61.05.cp;
- 77.22.Ej;
- 81.10.Aj;
- 61.66.Fn;
- X-ray diffraction;
- Polarization and depolarization;
- Theory and models of crystal growth;
- physics of crystal growth crystal morphology and orientation;
- Inorganic compounds