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Journal of Materials Science: Materials in Electronics

, Volume 30, Issue 17, pp 16494–16501 | Cite as

Enhanced ferroelectric properties and crystal structure of TGS0.74P0.26 single crystals

  • Sampathkumar Pongiappan
  • Srinivasan KaruppannanEmail author
Article
  • 21 Downloads

Abstract

The single crystals of triglycine sulpho phosphate (TGS0.74P0.26) were grown by slow evaporation method with 0.6 M of phosphoric acid in the growth solution. The crystal structure of the grown crystal is refined with 0.74 sulphur and 0.26 phosphorous occupancy with the formula of TGS0.74P0.26 using single crystal x-ray diffraction analysis. The dielectric, ferroelectric and pyroelectric properties of the TGS0.74P0.26 single crystals were investigated. The coercive field (Ec) and internal bias field (Ib) values are 8 kV/cm and 1.4 kV/cm, respectively and these values are found increased compared to the pure TGS and also low dielectric loss was observed. The pyroelectric coefficient of TGS0.74P0.26 crystal is 0.023 µC/cm2/°C and the pyroelectric figure of merit for current, voltage and detectivity are Fi = 105 pm/V, Fv = 0.055 m2/C and Fd = 22 µPa−1/2 respectively. Enhanced ferroelectric properties were observed when compared to the pure TGS crystals. The figure of merit for the detectivity (Fd) shows higher values when compared with that of the well-known materials such as PZT (11.5 µPa−1/2) and other lead free materials such as SBN (7.21 µPa−1/2) and CSBN (12 µPa−1/2). With these excellent properties, the TGS0.74P0.26 single crystal can be a promising material for the pyroelectric detector applications.

Notes

Acknowledgements

Authors would like to acknowledge the Defence Research and Development Organization (DRDO), New Delhi, Government of India for providing the financial support to carry out the research through DRDO-BU  CLS, Phase-II Programme.

Funding

This study was funded by Defence Research and Development Organization (DRDO), New Delhi, Government of India through DRDO-BU  CLS, Phase-II Programme (Grant No. DLS/86/50071/DRDO-BU Centre/Phase-II dated 20th February 2014).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. 1.Crystal Growth Laboratory, Physics DivisionDRDO-BU Center for Life Sciences, Bharathiar University CampusCoimbatoreIndia
  2. 2.Crystal Growth Laboratory, Department of Physics, School of Physical SciencesBharathiar UniversityCoimbatoreIndia

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