0000000000056179

AUTHOR

Vladimir V. Shvartsman

showing 3 related works from this author

Two-phase dielectric polar structures in 0.1NBT-0.6ST-0.3PT solid solutions

2018

Abstract In this work we address the peculiarities of the macroscopic responses in ternary 0.1Na0·5Bi0·5TiO3-0.6SrTiO3-0.3PbTiO3 (0.1NBT-0.6ST-0.3PT) solid solutions. These solid solutions exhibit a spontaneous first order relaxor to normal ferroelectric phase transition. The phase transition is accompanied by a broad dielectric relaxation which expands over 10 orders of magnitude in frequency just above the phase transition temperature. The temperature dependence of polarization shows that non-zero net polarization persists above the phase transition temperature. Below the phase transition temperature, it is not possible to describe the temperature dependence of polarization with a power l…

010302 applied physicsPhase transitionMaterials sciencePolymers and PlasticsCondensed matter physicsMetals and Alloys02 engineering and technologyDielectric021001 nanoscience & nanotechnologyPolarization (waves)01 natural sciencesFerroelectricityElectronic Optical and Magnetic MaterialsCondensed Matter::Materials SciencePiezoresponse force microscopyPhase (matter)0103 physical sciencesCeramics and CompositesRelaxation (physics)0210 nano-technologySolid solutionBauwissenschaften
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Direct observation of polar nanostructures in PLZT ceramics for electrooptic applications

2004

ABSTRACTTransparent Pb1-yLay(Zr1-xTix)1-y/4O3(PLZT, y=0.0975, x=0.35) ceramics prepared via hot pressing techniques were studied via piezoelectric force microscopy (PFM). Clear piezoelectric contrast is observed in a cubic relaxor phase indicating spatial distribution of polarization with an average cluster size of about 50 nm. The irregular polarization pattern is associated with the formation of a glassy state, where random electric and stress fields are responsible for the disruption of the long-range ferroelectric order. Local poling of the ceramics resulted in the formation of a stable micron-size domain that could be continuously switched under varying dc bias (local hysteresis loop).…

Materials scienceCondensed matter physicsbusiness.industryPolingPolarization (waves)Hot pressingFerroelectricityFractal dimensionPiezoelectricityvisual_artvisual_art.visual_art_mediumOptoelectronicsCeramicbusinessDC biasMRS Proceedings
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Polar nanodomains and local ferroelectric phenomena in relaxor lead lanthanum zirconate titanate ceramics

2005

Transparent Pb0.9125La0.0975(Zr0.65Ti0.35)0.976O3 ceramics (conventionally abbreviated as PLZT 9.75/65/35) is a typical relaxor characterized by the absence of the ferroelectric order at the macroscopic scale. In this letter, we report on the observation of complex polar structures on the surface of this material via piezoresponse force microscopy (PFM). The irregular polarization patterns are associated with the formation of a glassy state, where random electric fields destroy the long-range ferroelectric order. The measure of the disorder, the correlation length of ∼50nm, was directly deduced from the PFM images. Local poling of relaxor ceramics resulted in the formation of a stable micro…

Phase transitionMaterials sciencePhysics and Astronomy (miscellaneous)Condensed matter physicsFerroelectric ceramicsPolingNanotechnologyDielectricFerroelectricityTitanatePiezoresponse force microscopyvisual_artvisual_art.visual_art_mediumCeramicApplied Physics Letters
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