Dielectric behaviour of strontium tartrate single crystals

Abstract

Strontium tartrate trihydrate (STT) crystals have been grown in silica hydrogel. Various polarization mechanisms such as atomic polarization of lattice, orientational polarization of dipoles and space charge polarization in the grown crystals have been understood using results of the measurements of dielectric constant (ε ε′ ′) and dielectric loss (tan δ δ) as functions of frequency and temperature. Ion core type polarization is seen in the temperature range 75-180°C, and above 180°C, there is interfacial polarization for relatively lower frequency range. One observes dielectric dispersion at lower frequency presumably due to domain wall relaxation.

Growth and characterization of Struvite‐K crystals

“…As the frequency increases, a point is reached where the space charge can not sustain and comply with the external field, and hence the polarization decreases and exhibits the reduction in the values of dielectric constant as frequency increases. This has been discussed in detail elsewhere [37][38][39]. From the data of the variation of dielectric loss (D = tan δ) with frequency of applied field at room temperature, it was observed that dielectric loss increased up to 2 kHz and followed by decreasing nature with higher frequency.…”

Growth and characterization of Mn2+ doped calcium l-tartrate crystals

“…As the frequency increases, a point is reached where the space charge cannot sustain and comply the external field. Therefore the polarization decreases and exhibiting the reduction in the values of dielectric constant as the frequency increases [15]. Also, as the Mn 2+ doping level increases the value of κ increases, which suggests that the interstitial nature of the doping increases the space charge polarizability without altering the basic ferroelctric nature of the crystals.…”

Growth and characterization of strontium tartrate pentahydrate crystals

“…In the present study , growth of strontium tartrate which is different not only in respect of number of water molecules from the one grown by Arora et al but also different in terms of cell parameters, morphological development, thermal stability and FTIR spectroscopic results. As a result, the properties of the grown crystals such as mechanical properties, dielectric properties, magnetic properties are expected to be quite different from the crystals reportedly grown by other workers [14,15]. The authors have carried out indentation induced hardness testing studies on five different habit faces of the crystal, and the results thus obtained will be published elsewhere…”