Optical properties of TGS crystals doped with metal ions in the vicinity of phase transition

Domain wall saddle point morphology in ferroelectric triglycine sulfate

“…It has been suggested that the availability of free carriers could make all the difference 19 . However, the optical band gaps of LNO and KTP (3.8 and 3.2-3.6 eV respectively) [27][28][29] lie between those of PGO and TGS (3 and 5 eV respectively) 18,30 and experimentally determined dc conductivity measurements show that, in the absence of conducting walls, bulk LNO is the most insulating of this group [31][32][33][34] and hence the most likely to try to avoid polar discontinuities (they would be difficult to screen by free charge In summary, we have studied the geometry of the three-dimensional domain wall network in ferroelectric triglycine sulphate, using tomographic AFM techniques. Using TPFM, in particular, we revealed 3D domain wall structures and found the common occurrence of saddle-points, characteristic of the kinds of polarisation divergence-avoiding domain bifurcation textures recently discovered in PGO.…”

OPTICAL AND MECHANICAL PROPERTIES OF MgCl2 ADDED TRIGLYCINE SULPHATE SINGLE CRYSTALS

“…13 Fadl has investigated the optical constants of Fe 3+ , Cr 3+ , Co 3+ , Cu 2+ , Mn 2+ , Ni 2+ ions doped with TGS crystals. 9, 14 The structural changes, transmittance and dielectric studies of the McTGS crystals were reported elsewhere. 15 ICP-OES analysis shows that the concentration of magnesium is low to form a complex with TGS crystals and hence it can be concluded that the magnesium chloride can be incorporated into void space within the crystal lattice of McTGS crystals.…”