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Temperature Behavior of the Coefficients
of Combined Piezoelectrooptical Effect at the Proper Ferroelectrical Phase
Transition in Pb5Ge3O11
Vlokh R., Mys O., Kostyrko M.
Institute of Physical Optics, 23 Dragomanov Str., Lviv,
79005, Ukraine
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The article is devoted to the study of a combined piezoelectrooptical
effect induced by a bias electric field and external mechanical stress
in the Pb5Ge3O11 crystals at the proper ferroelectrical phase transition.
The measurements were carried out on the application of electrical field
and of mechanical stress ?33 along z axis. The electrooptical “butterfly”
like hysteresis loops were obtained at different temperatures in the range
of the ferroelectric phase on the application of different magnitudes of
mechanical stress. On the base of dependencies ?n=f(E3,?33) the temperature
behavior of the electrooptical coefficient of Pockels effect n33r33-n13r13,
Kerr effect n33R33-n13R13 and coefficients of combined piezoelectrooptical
effect n33N333-n13N133 were obtained. Phenomenological analysis of
the temperature dependence of these coefficients have been made. It was
shown that temperature dependence of combined bilinear piezoelectrooptical
effect coefficients in the ferroelectrical phase follow the temperature
dependence of dielectric permitivity. The Curie-Weiss constant has been
calculated on electrooptical measurements (C=1.21*10+4K) and on piezoelectrooptical
measurements (C=1.22*10+4K) and it is in good agreement with the value
obtained from dielectric measurements (C=1.04*104+K).
Key words: combined piezoelectrooptical effect, ferroelectrics, electrooptical
effect, Pb5Ge3O11 crystals.
PACS: 78.20.Hp,78.20.Jq
doi 10.3116/16091833/3/4/277/2002 |
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References
1. Vlokh R, Gotra Z, Andrushchak A, Mys O, Kaidan M, 2001. Ukr.J.Phys.Opt.
2: 36.
doi:10.3116/16091833/2/1/36/2001
http://dx.doi.org/10.3116/16091833/2/1/36/2001
2. Mys O, Vlokh R, 2001. Ukr.J.Phys.Opt. 4: 187
doi:10.3116/16091833/2/4/187/2001
http://dx.doi.org/10.3116/16091833/2/4/187/2001
3. Vlokh R, Mys O, Andrushchak A, Kostyrko M, 2002. Ukr.J.Phys.Opt.
3: 115.
doi:10.3116/16091833/3/2/115/2002
http://dx.doi.org/10.3116/16091833/3/2/115/2002
4. Vlokh O, Sergatyuk V, 1987. News of Acad. Sc. of USSR 51: 2183.
5. Vlokh OG, Vlokh RO, 1990. Optics and spectroscopy 69: 458.
6. Hitoshi H, Natsamura S, 1974. Jap.J.Appl.Phys. 13: 17.
doi:10.1143/JJAP.13.17
http://dx.doi.org/10.1143/JJAP.13.17
7. Nolland WA, 1973. Ferroelectrics 5: 287.
8. Lines ME, Glass AM, 1977. Principle and Application of Ferroelectrics
and Related Materials. Clarendon Press, Oxford.
9. Iwasaki H, Miyazawa S, Koizumi H, Sugii K, Niizeki N, 1972. J.Appl.Phys.
43: 4907
doi:10.1063/1.1661044
http://dx.doi.org/10.1063/1.1661044 |