Observation of dynamics of hydrogen bonds in TGS crystals by means of measurements of pyroelectric currents induced by changes of temperature

TL;DR

This paper investigates the complex pyroelectric responses of TGS crystals to temperature changes, revealing the activation of hydrogen bonds and demonstrating a simple, precise measurement method applicable in many laboratories.

Contribution

It introduces a novel, straightforward method to measure pyroelectric currents in TGS crystals, elucidating hydrogen bond dynamics during temperature variations.

Findings

Pyroelectric signals are complex and linked to hydrogen bond activation.

Signals are observed even in the paraelectric phase during pulse heating.

The measurement method is simple, precise, and widely applicable.

Abstract

The study of pyroelectric response of monocrystalline TGS cubic specimens to changes of temperature induced by linear and pulse heating of three mutually perpendicular pairs of cube sides demonstrated a complicated structure of signals. We attribute their forms to the activation of various hydrogen bonds between glycine I, II, III molecules. In the case of pulse heating the pyroelectric signal is observed also in the paraelectric phase. The applied measurement method is relatively simple but precise and can be realized in most of dielectric measurements laboratories.