Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/92720
Title: Barkhausen pulses caused by domain merging in congruent lithium niobate
Authors: Akhmatkhanov, A. R.
Kipenko, I. A.
Esin, A. A.
Shur, V. Ya.
Шур, В. Я.
Issue Date: 2020
Publisher: American Institute of Physics Inc.
Citation: Akhmatkhanov A. R. Barkhausen pulses caused by domain merging in congruent lithium niobate / A. R. Akhmatkhanov, I. A. Kipenko, A. A. Esin, V. Ya. Shur. — DOI 10.1063/5.0014220 // Applied Physics Letters. — 2020. — Vol. 2. — Iss. 117. — 22903.
Abstract: The analysis of the shapes of Barkhausen pulses (BPs) was used for the detailed characterization of the domain merging process in congruent lithium niobate LiNbO3 (CLN) crystals. The BPs in ferroelectrics manifest themselves as the sharp peaks in a switching current during polarization reversal by the application of a constant or slow-varying external electric field. Three mechanisms of the BPs were previously proposed: domain nucleation, interaction of the domain walls with the pinning centers, and domain merging. We have revealed the domination of the domain merging mechanism for the generation of the BPs in CLN and classified the scenarios of domain structure evolution after merging in terms of the appearance and transformation of short-lived fast and superfast domain walls. We have shown that the input of merging events reaches 80% of the whole switching process. Two revealed types of BPs corresponding to the merging events considerably differ by duration and shape, thus opening the way for solution of the inverse problem - extracting the quantitative information about the domain kinetics by the analysis of the BPs. This analysis allows extracting the velocities of the fast and superfast walls and provides the possibility to go beyond the temporal resolution of the in situ imaging system in studying the superfast domain wall motion. The proposed analysis is applicable for the faceted growth of polygonal domains in any ferroelectric. It is necessary to point out that the analysis of the BPs allowed characterizing the main part of the domain evolution process in CLN as the fast domain transformations after merging prevail during the polarization reversal. © 2020 Author(s).
Keywords: DOMAIN WALLS
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
IMAGE RESOLUTION
INVERSE PROBLEMS
LITHIUM
LITHIUM COMPOUNDS
NIOBIUM COMPOUNDS
POLARIZATION
CONGRUENT LITHIUM NIOBATE
DOMAIN TRANSFORMATION
DOMAIN WALL MOTION
EXTERNAL ELECTRIC FIELD
POLARIZATION REVERSALS
QUANTITATIVE INFORMATION
SWITCHING CURRENTS
TEMPORAL RESOLUTION
MERGING
URI: http://hdl.handle.net/10995/92720
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85088154779
WOS ID: 000553041900001
PURE ID: 13388282
ISSN: 36951
DOI: 10.1063/5.0014220
metadata.dc.description.sponsorship: Russian Science Foundation, RSF: 19-72-00083
The equipment of the Ural Center for Shared Use “Modern nanotechnology” UrFU was used. The research was made possible by the Russian Science Foundation (Project No. 19-72-00083).
RSCF project card: 19-72-00083
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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