Effect of germanium doping on pyroelectric and piezoelectric properties of Sn sub(2)P sub(2)S sub(6) single crystal

The results of the search for dopants to optimize the ferroelectric phase transition temperature and pyroelectric and piezoelectric properties of Sn sub(2)P sub(2)S sub(6) crystals are reported. Among all dopants only germanium causes a pronounced shift of the phase transition toward higher temperat...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2000-07, Vol.47 (4), p.877-880
Main Authors: Maior, M M, Gurzan, M I, Molnar, Sh B, Prits, I P, Vysochanskii, Yu M
Format: Article
Language:English
Subjects:
Crystals
Curie temperature
Dopants
Doping
Ferroelectric materials
Germanium
Phase transformations
Piezoelectricity
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Summary:The results of the search for dopants to optimize the ferroelectric phase transition temperature and pyroelectric and piezoelectric properties of Sn sub(2)P sub(2)S sub(6) crystals are reported. Among all dopants only germanium causes a pronounced shift of the phase transition toward higher temperatures. The highest Curie temperature achieved by Ge doping is as high as 88 degree C. The major advantage of the Ge-doped crystals as compared to pure Sn sub(2)P sub(2)S sub(6) is that the hydrostatic piezoelectric and pyroelectric response is kept high in a wider temperature range with much lower temperature dependence. The effects of the doping on pyroelectric and piezoelectric properties, characterizing the sensitivity of the material to thermal and hydroacoustic excitation, are discussed.
ISSN:0885-3010
DOI:10.1109/58.852069