EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K

M. Lemeshko, E. Nazarenko, A.. Gonchar, L. Reznichenko, T. Nedoseykina, A. Novakovich, O. Mathon, Y. Joly, R. Vedrinskiǐ, Physical Review B - Condensed Matter and Materials Physics 76 (2007).

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Abstract
We use the x-ray absorption fine structure spectroscopy at Nb K edge to reveal the local atomic structure of KxNa1−xNbO3 (PSN) solid solutions. The study is performed over the temperature range 10–1023K for six different x values. We show that only the combined analysis of extended x-ray absorption fine structure and preedge fine structure provides complete and reliable information about the local structure of NbO6 octahedra. Such extensive treatment of the experimental data shows that the local structure of PSN could be described within the spherical model proposed earlier as a hypothesis for perovskite-type ferroelectric zirconates. We reveal that the Nb atoms are localized near their average positions on the sphere surfaces for all temperatures and x values. With regard to previous results we point out the features of microscopic structure common for PSN and perovskite-type zirconates.
Publishing Year
Date Published
2007-10-09
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Acknowledgement
This work was partially supported by Russian Foundation for Basic Research Grant No. 07-02-00796a. The authors are indebted to the French Government for financial support of E.S.N. and M.P.L. within the CNOUS program.
Volume
76
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Lemeshko M, Nazarenko E, Gonchar A., et al. EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K. Physical Review B - Condensed Matter and Materials Physics. 2007;76. doi:http://dx.doi.org/10.1103/PhysRevB.76.134106
Lemeshko, M., Nazarenko, E., Gonchar, A. ., Reznichenko, L., Nedoseykina, T., Novakovich, A., … Vedrinskiǐ, R. (2007). EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K. Physical Review B - Condensed Matter and Materials Physics, 76. http://dx.doi.org/10.1103/PhysRevB.76.134106
Lemeshko, Mikhail, Elena Nazarenko, A.A Gonchar, Larisa Reznichenko, Tatiana Nedoseykina, Alexander Novakovich, Olivier Mathon, Yves Joly, and Rostislav Vedrinskiǐ. “EXAFS Studies of the Local Atomic Structure of the Lead-Free Piezoelectric Ceramics KxNa1−xNbO3 over the Temperature Range 10–1023K.” Physical Review B - Condensed Matter and Materials Physics 76 (2007). http://dx.doi.org/10.1103/PhysRevB.76.134106.
M. Lemeshko et al., “EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K,” Physical Review B - Condensed Matter and Materials Physics, vol. 76, 2007.
Lemeshko M, Nazarenko E, Gonchar A., Reznichenko L, Nedoseykina T, Novakovich A, Mathon O, Joly Y, Vedrinskiǐ R. 2007. EXAFS studies of the local atomic structure of the lead-free piezoelectric ceramics KxNa1−xNbO3 over the temperature range 10–1023K. Physical Review B - Condensed Matter and Materials Physics. 76.
Lemeshko, Mikhail, et al. “EXAFS Studies of the Local Atomic Structure of the Lead-Free Piezoelectric Ceramics KxNa1−xNbO3 over the Temperature Range 10–1023K.” Physical Review B - Condensed Matter and Materials Physics, vol. 76, American Physical Society, 2007, doi:http://dx.doi.org/10.1103/PhysRevB.76.134106.

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