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Katia Gallo - One of the best experts on this subject based on the ideXlab platform.
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Modification of the Domain Kinetics in Congruent Lithium Niobate by Proton Exchanged Surface Layers
2006Co-Authors: Vladimir Ya. Shur, A. I. Lobov, E. I. Shishkin, M. A. Dolbilov, D. K. Kuznetsov, Sorin Tascu, Pascal Baldi, Marc De Micheli, Katia GalloAbstract:We have studied the Domain kinetics in congruent lithium niobate (CLN) single crystals with different types of the proton exchanged surface layers. The influence of the artificial dielectric layers and the surface gradient of the spontaneous polarization on the Domain structure Geometry, the shape of the individual Domains, and the switching parameters were demonstrated. It was shown that after several cycles of polarization reversal the Domain kinetics changes drastically. As a result the Domain Geometry is defined by spatial distribution of the residual Domains existing in the area of Domain merging during the previous switching. The role of residual Domains increases with the cycle number.
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Study of the field-induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in-situ optical method
2005Co-Authors: Vladimir Ya. Shur, M. Nebogatnikov, Ivan Baturin, S. A. Negashev, A. I. Lobov, E. A. Rodina, Katia GalloAbstract:Study of the Field-induced Evolution of the Domain Geometry in Lithium Niobate and Lithium Tantalate Single Crystals by in-situ Optical Method
L E Cross - One of the best experts on this subject based on the ideXlab platform.
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Engineering multiDomain ferroic samples
Ferroelectrics, 2001Co-Authors: J. Fousek, L E CrossAbstract:Abstract The existence of Domains is essential in many practical applications of ferroics. Here we discuss devices in which a fixed spatial distribution of Domains plays the significant role. Depending on the prevailing attributes of multiDomain single crystals, three different possibilities can be distinguished. In Domain-Geometry-engineered samples the spatial distribution of Domains is tuned to correspond to the K-vectors of fields propagating through the material. In Domain-average-engineered samples the crystal is subdivided into a very large number of Domains, representing a limited number of Domain states. In Domain-wall-engineered samples the characteristics of static walls can play an essential role in the averaged macroscopic properties. Examples illustrating these approaches are given.
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Domain Geometry engineering and Domain average engineering of ferroics
Journal of Physics: Condensed Matter, 2001Co-Authors: Jan Fousek, D B Litvin, L E CrossAbstract:MultiDomain samples of ferroics (ferroelectrics, ferroelastics, and related materials) with fixed geometrical distribution of Domains can offer new macroscopic properties required for particular applications. Two extreme cases of such applications are defined. In Domain-Geometry-engineered samples of ferroic crystals, the spatial distribution of Domains and thus the spatial distribution of tensorial properties is tuned to correspond to the k-vectors of applied electric, optical or acoustic fields. For a given wavelength, the size, Geometry, and distribution of Domains give rise to a qualitatively new kind of response specified by the symmetry of the multiDomain system. In Domain-average-engineered samples of ferroic crystals, the specimen is subdivided into a very large number of Domains, representing µ Domain states where µ is smaller than the theoretically allowed maximum number, and forming a regular or irregular pattern. Its response to external fields is roughly described by tensorial properties averaged over all of the Domain states involved. The effective symmetry of the Domain-average-engineered system is given by a point group H and we show how it can be determined. As an example, all groups H are specified for Domain-average-engineered samples which can arise in a material undergoing the phase transition with symmetry change from mm to 3m.
E. A. Rodina - One of the best experts on this subject based on the ideXlab platform.
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study of field induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in situ optical method
Ferroelectrics, 2008Co-Authors: Ya V Shur, Ivan Baturin, S. A. Negashev, A. I. Lobov, M. S. Nebogatikov, E. A. RodinaAbstract:The registration of light diffraction on Domain structure was applied for studying the Domain structure evolution during polarization reversal in single crystals of different representatives of lithium niobate LiNbO 3 and lithium tantalate LiTaO 3 family. The evolution of the angular dependence of diffracted light intensity during polarization reversal was used for characterization of the Domain structure kinetics. Comparison of the angular dependences with corresponding instantaneous Domain patterns allows to propose the interpretation of the Domain structure evolution. Spatial filtration of the diffracted beam allowed to separate the relative input of Domain walls of different orientations with high temporal resolution.
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Study of the field-induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in-situ optical method
2005Co-Authors: Vladimir Ya. Shur, M. Nebogatnikov, Ivan Baturin, S. A. Negashev, A. I. Lobov, E. A. Rodina, Katia GalloAbstract:Study of the Field-induced Evolution of the Domain Geometry in Lithium Niobate and Lithium Tantalate Single Crystals by in-situ Optical Method
A. I. Lobov - One of the best experts on this subject based on the ideXlab platform.
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study of field induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in situ optical method
Ferroelectrics, 2008Co-Authors: Ya V Shur, Ivan Baturin, S. A. Negashev, A. I. Lobov, M. S. Nebogatikov, E. A. RodinaAbstract:The registration of light diffraction on Domain structure was applied for studying the Domain structure evolution during polarization reversal in single crystals of different representatives of lithium niobate LiNbO 3 and lithium tantalate LiTaO 3 family. The evolution of the angular dependence of diffracted light intensity during polarization reversal was used for characterization of the Domain structure kinetics. Comparison of the angular dependences with corresponding instantaneous Domain patterns allows to propose the interpretation of the Domain structure evolution. Spatial filtration of the diffracted beam allowed to separate the relative input of Domain walls of different orientations with high temporal resolution.
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Modification of the Domain Kinetics in Congruent Lithium Niobate by Proton Exchanged Surface Layers
2006Co-Authors: Vladimir Ya. Shur, A. I. Lobov, E. I. Shishkin, M. A. Dolbilov, D. K. Kuznetsov, Sorin Tascu, Pascal Baldi, Marc De Micheli, Katia GalloAbstract:We have studied the Domain kinetics in congruent lithium niobate (CLN) single crystals with different types of the proton exchanged surface layers. The influence of the artificial dielectric layers and the surface gradient of the spontaneous polarization on the Domain structure Geometry, the shape of the individual Domains, and the switching parameters were demonstrated. It was shown that after several cycles of polarization reversal the Domain kinetics changes drastically. As a result the Domain Geometry is defined by spatial distribution of the residual Domains existing in the area of Domain merging during the previous switching. The role of residual Domains increases with the cycle number.
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Study of the field-induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in-situ optical method
2005Co-Authors: Vladimir Ya. Shur, M. Nebogatnikov, Ivan Baturin, S. A. Negashev, A. I. Lobov, E. A. Rodina, Katia GalloAbstract:Study of the Field-induced Evolution of the Domain Geometry in Lithium Niobate and Lithium Tantalate Single Crystals by in-situ Optical Method
Vladimir Ya. Shur - One of the best experts on this subject based on the ideXlab platform.
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Modification of the Domain Kinetics in Congruent Lithium Niobate by Proton Exchanged Surface Layers
2006Co-Authors: Vladimir Ya. Shur, A. I. Lobov, E. I. Shishkin, M. A. Dolbilov, D. K. Kuznetsov, Sorin Tascu, Pascal Baldi, Marc De Micheli, Katia GalloAbstract:We have studied the Domain kinetics in congruent lithium niobate (CLN) single crystals with different types of the proton exchanged surface layers. The influence of the artificial dielectric layers and the surface gradient of the spontaneous polarization on the Domain structure Geometry, the shape of the individual Domains, and the switching parameters were demonstrated. It was shown that after several cycles of polarization reversal the Domain kinetics changes drastically. As a result the Domain Geometry is defined by spatial distribution of the residual Domains existing in the area of Domain merging during the previous switching. The role of residual Domains increases with the cycle number.
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Study of the field-induced evolution of the Domain Geometry in lithium niobate and lithium tantalate single crystals by in-situ optical method
2005Co-Authors: Vladimir Ya. Shur, M. Nebogatnikov, Ivan Baturin, S. A. Negashev, A. I. Lobov, E. A. Rodina, Katia GalloAbstract:Study of the Field-induced Evolution of the Domain Geometry in Lithium Niobate and Lithium Tantalate Single Crystals by in-situ Optical Method