Abstract:
The changes in the defect structure in the near-surface layers of lithium tetraborate (Li$_{2}$B$_{4}$O$_{7}$) single crystals under the influence of an external electric field applied along the polar direction [001] have been studied. Using the X-ray diffractometry with 2 ms time resolution the dynamics of the 004 and 008 diffraction peak parameters (the angular position and the integral intensity) variation was determined. Two types of processes caused by the redistribution of the charge localized at the surface of the polar dielectric and by the migration of lithium ions have been observed with different velocity and response time to the external field switching. The measurements are carried out at voltages at which the induced effects have reversible characters. The use of two orders of diffraction with different X-ray extinction lengths made it possible to visualize space charge layers near the anode and cathode by the intensity variation of the diffraction peaks. The estimation of the effective thickness of the charged near-surface layer gives the value of 25 $\mu$m for lithium ions at the cathode and about 45 $\mu$m for lithium vacancies at the anode.
This work was supported by the Ministry of Science and Higher Education within the State assignment FSRC Crystallography and Photonics RAS in part of “crystal growth, sample preparation and data processing” and by the Russian Foundation for Basic Research (project 19-52-12029 NNIO_a) in part of “the development of the time-resolved technique and the studies of lithium tetraborate under the influence of electric field”.
Citation:
A. G. Kulikov, A. E. Blagov, N. V. Marchenkov, Yu. V. Pisarevskii, M. V. Koval'chuk, “Fast near-surface changes in the defect structure in lithium tetraborate crystals in an external electric field”, Fizika Tverdogo Tela, 62:12 (2020), 2120–2128; Phys. Solid State, 62:12 (2020), 2384–2392
\Bibitem{KulBlaMar20}
\by A.~G.~Kulikov, A.~E.~Blagov, N.~V.~Marchenkov, Yu.~V.~Pisarevskii, M.~V.~Koval'chuk
\paper Fast near-surface changes in the defect structure in lithium tetraborate crystals in an external electric field
\jour Fizika Tverdogo Tela
\yr 2020
\vol 62
\issue 12
\pages 2120--2128
\mathnet{http://mi.mathnet.ru/ftt8228}
\crossref{https://doi.org/10.21883/FTT.2020.12.50216.087}
\elib{https://elibrary.ru/item.asp?id=44821351}
\transl
\jour Phys. Solid State
\yr 2020
\vol 62
\issue 12
\pages 2384--2392
\crossref{https://doi.org/10.1134/S1063783420120185}
Linking options:
https://www.mathnet.ru/eng/ftt8228
https://www.mathnet.ru/eng/ftt/v62/i12/p2120
This publication is cited in the following 5 articles:
M. V. Kovalchuk, E. I. Mareev, A. G. Kulikov, F. S. Pilyak, N. N. Obydennov, F. V. Potyomkin, Yu. V. Pisarevsky, N. V. Marchenkov, A. E. Blagov, “Subnanosecond X-ray diffraction technique for studying laser-induced polarization-dependent processes in KISI-Kurchatov”, Kristallografiâ, 69:2 (2024), 221
M. V. Kovalchuk, E. I. Mareev, A. G. Kulikov, F. S. Pilyak, N. N. Obydennov, F. V. Potemkin, Yu. V. Pisarevsky, N. V. Marchenkov, A. E. Blagov, “Subnanosecond X-ray Diffraction Technique for the Study of Photoinduced Polarization-Dependent Processes on the KISI-Kurchatov”, Crystallogr. Rep., 69:2 (2024), 165
F. S. Pilyak, A. G. Kulikov, Yu. V. Pisarevsky, A. E. Blagov, M. V. Kovalchuk, “Separation of the Mechanisms of Photoinduced Deformations in Crystals Using Time-Resolved X-ray Diffractometry”, Crystallogr. Rep., 67:5 (2022), 791
Arsen Petrenko, Nataliya Novikova, Alexander Blagov, Anton Kulikov, Yury Pisarevskii, Igor Verin, Michail Kovalchuk, “Lateral deformations of a crystal of potassium acid phthalate in an external electric field”, J Appl Crystallogr, 54:5 (2021), 1317
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