Features of phase transitions in nanosized powders KTa0.7Nb0.3O3
Keywords:
phase transitions, Raman spectroscopy, nanosized powders, potassium tantalate-niobate
Abstract
Raman spectra of the nanopowder solid solution КТа0.7Nb0.3O3 were obtained and investigated for the first time. The compound was synthesized by a new technology. Temperature dependences of the in-tensity, width and frequency of the В1(TO2), А1(TO1), В1(TO3), А1(ТO3) and В2(TO3) modes are thoroughly analyzed. A significant narrowing of the temperature interval, including three phase transitions, is registered. The interval amounts 100°, from about –130 °С to –30 °С. In nanopowders KNbO3 the interval is almost 500°, from 0 °С to 475 °С. It was found that the temperatures of each of the phase transitions are shifted in different way, in particular: a low-temperature transition at 20° lower, the middle transition at 10° higher, and a ferroelectric phase transition occurs at 10° lower than the corres-ponding transitions in macrocrystals KТa0.7Nb0.3O3.
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References
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Fox A.J. Nonlinear longitudinal KTN modulator //Appl. Opt. – 1975. – Vol. 14. – P. 343-352.
Yilmaz S., Venkatesan T., Gerhard-Multhaupt R. Pulsed laser deposition of stoichiometric potas
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Wang X.P., Wang J.Y., Zhang H.J., Yu Y.G., Wu J., Gao W.L., Boughton R.I. Thermal properties of cubic KTa1–xNbxO3 crystals//Journal of Applied Physics. – 2008. – Vol. 103. – P. 033513.
Bartasyte A., Kreisel J., Peng W., GuillouxViry M. Temperature-dependent Raman scattering of KTa1–xNbxO3 thin films//Appl. Phys. Lett. – 2010. – Vol. 96. – Р. 262903.
Specht E.D., Christen H.-M., Norton D.P., Boatner L.A. X-Ray Diffraction Measurement of the Effect of Layer Thickness on the Ferroelectric Transition in Epitaxial KTaO3/KNbO3 Multilayers//Phys. Rev. Lett. – 1998. – Vol. 80. – P. 4317-4320.
Korsah K., Kisner R., Boatner L., Christen H., Paris D. Preliminary investigation of KTN as a surface acoustic wave infrared/thermal detector //Sens. Actu. A.– 2005.– Vol. 119. – P. 358-364.
Zheng K.Y., Wei N., Yang F.X., Zhang D.M., Qi Y.J. KTa0.4Nb0.6O3 nanoparticles synthesized through solvothermal method//Front. Phys. China. – 2007. – Vol. 2. – P. 436-439.
Hu Y.M., Gu H.S., Hu Z., Di W., Yuan Y., You J., Cao W., Wang Y., Chan H.L.W. Controllable Hydrothermal Synthesis of KTa1"xNbxO3 Nanostructures with Various Morphologies and Their Growth Mechanisms//Cryst. Grow. Design. – 2008. – Vol. 8. – P. 832-837.
Hu Y.M., Gu H.S., Zhou D., Wang Z., Chan H.L.W., Wang Y. Orientation-Control Synthesis of KTa0.25Nb0.75O3 Nanorods//J. Am. Ceram. Soc. – 2010. – Vol. 93. – P. 609-613.
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Golovina I.S., Kolesnik S.P., Bryksa V., Strelchuk V., Yanchuk I.B., Geifman I.N., Khainakov S.A., Svechnikov S.V., Morozovska A.N. Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3//Physica B: Condens. Matter. – 2012. – Vol. 407. – P. 614-623.
Головіна І.С., Гейфман І.Н., Прокопів М.М. Особливості діелектричних і магнітно-резонансних характеристик нанокристалічного танталату калію//УФЖ. – 2012. – T. 57, № 1. – C. 63-70.
Golovina I.S., Bryksa V.P., Strelchuk V.V., Zolotovsky A.A., Geifman I.N., Andriiko A.A. Size effects in the temperatures of phase transitions in KNbO3 nanopowder//Journal of Advanced Dielectrics (submitted).
Triebwasser S. Study of Ferroelectric Transitions of Solid-Solution Single Crystals of KNbO3-KTaO3//Phys. Rev. – 1959. – Vol. 114. – P .63-70.
Kugel G.E., Mesli H., Fontana M.D., Rytz D. Experimental and theoretical study of the Raman spectrum in КТа1–хNbxO3 solid solutions//Phys. Rev. B. – 1988. – Vol. 37. – P. 5619-5628.
Лайнс М., Гласс А. Сегнетоэлектрики и родственные им материалы. – М.: Мир, 1981. – 736 с.
Baier-Saip A., Ramos-Moor E., Cabrera A.L. Raman study of phase transitions in KNbO3// Solid State Communications. – 2005. – Vol. 135. – P. 367-372.
Published
2012-10-04
How to Cite
Головина, И. С., Брыкса, В. П., Стрельчук, В. В., Родионов, В. Е., & Литвиненко, В. В. (2012). Features of phase transitions in nanosized powders KTa0.7Nb0.3O3. Journal of Surface Physics and Engineering, 10(4), 403 - 410. Retrieved from https://periodicals.karazin.ua/pse/article/view/10160
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