Ferroelectric studies on amino acids mixed TGSP single crystals

• Published in: Materials letters Vol. 33; no. 5; pp. 251 - 254
• Main Authors: Arunmozhi, G., Jayavel, R., Subramanian, C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 1998; Elsevier
• Subjects: Amino acid substituents; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Ferroelectric; Ferroelectricity and antiferroelectricity; Kdp- and tgs-type crystals; Physics; Pyroelectric; Pyroelectric and electrocaloric effects; Triglycine sulphophosphate; Ferroelectric; 77.84. — s; 77.80. — e; Pyroelectric; Amino acid substituents; Triglycine sulphophosphate; Dielectric; 11.22. — d; Phosphates; TGS; Monocrystals; Ferroelectricity; Amino acids; Pyroelectricity; Experimental study
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/S0167-577X(97)00114-6

Amino acids mixed TGS crystals are of interest due to their high pyroelectric coefficient and low dielectric constant. Partial substitution of phosphate has resulted in triglycine sulpho-phosphate (TGSP), a mixed crystal with improved pyroelectric figure of merit. In order to study the effect of amino acids on the ferroelectric properties of TGSP, we have substituted l-alanine (ATGSP), l-valine (VTGSP), l-asparagine (ASP-TGSP) and l-arginine (ARG-TGSP) in pure TGSP The pyroelectric studies and P-E hysteresis measurements carried out on these mixed crystals are reported. A scanning electron microscope in the secondary electron emission mode has been employed to visualize the domains on the mixed crystals.