Orientation of structure and crystals of TGS and TGS doped with D, al or L, al

Abstract

h drscriptioii of the various orientations of microstructure and large single crystals of triglycine sulphate (TGS) is reviewed. A difference of the orielitation of TGS in polydornain statc anti in two possible singledomain states is discussed. The conclusions arc applied t o TGS crystals doped with L, alariirie or U, alanine.

Dielectric Properties of Triglycine Sulphate Crystals Admixtured with L-Threonine

“…The sample surfaces perpendicular to their ferroelectric axis were covered by evaporated silver (849) electrodes. LTTGS crystals grow along the "b" axis asymmetrically with respect to the nucleus, similarly as it has been observed for LATGS [3,4], DATGS [5], LSTGS [6] and DSTGS [7] crystals.…”

“…Owing to this phenomenon dielectric parameters of the admixtured crystals undergo only slight changes in the process of spontaneous ageing, which is of particular importance in the application of TGS crystals. So far the influence of such admixtures as L-and D-alanine [1][2][3][4][5], L-, D-, DL-serine [6][7][8], L-valine [12], phosphaglycine [9] and haloacetamide [10] on physical properties of TGS crystals has been studied. This paper presents results of investigation of L-threonine admixture on dielectric properties of TGS crystals (LTTGS).…”

Investigation of the Dependence of Dielectric Properties of D-Serine Admixtured TGS Crystals on the Distance from the Seed of the Crystal Growth

“…TGS crystals with D-serine admixture grow asymmetrically with respect to the seed along "b" axis similarly as it was observed for L-serine TGS crystal, though the asymmetry was now found to develop in the opposite direction. Asymmetry of the same kind was also observed for TGS crystals admixtured with L-α-alanine [4,6,10,11] as well as D-α-alanine [11].…”

“…Havrànkovà [11] and Nakatani [6]. Figures 3a and 3b present the maximum permittivity values against the sites of the b-cuts samples, cut out in the sequence along the b axis (Fig.…”

“…serine, alanine) [1][2][3][4][5][6][7][8][9][10][11][12] or inorganic (metal ion, e.g. chromium, iron, copper) [13][14][15][16] admixture to the solution from which the TGS crystals are grown.…”