Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Domain switching"”.
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Domain Switching and Microcracking in Ferroelectric Single Crystals and Polycrystalline Ceramics
In polycrystalline piezoelectric ceramics, electric field-induced cracking occurred by intergranular fracture. The macroscopic path of the crack growth depended strongly upon the applied field and the poling direction. Analysis showed that cracks extended along the place of maximum normal strain. …
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On an Accelerated Fatigue -Testing Technique Using Piezoelectric Actuators
… our results showed that repeated non-180° domain switching and phase transition alone did not result in ferroelectric fatigue. Rather, this fatigue is more likely due to electric charge accumulations at grain boundaries induced by repeated 180° domain switching.
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Edge-defined film-fed growth of single-crystal piezoelectrics
… up to ... with hysteresis consistent with 90° domain switching. Electromechanical actuation and crystal structure in this system appear to be strongly affected by deviations from stoichiometry (B-site vacancies). Barium segregation and bismuth vaporization can also compromise electromechanical …
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Belęšė holografijos sistema žadinimo zondavimo eksperimentuose /
… shock waves in solid state bodies, ferroelectric domain switching, and the formation of color centers. This versatility and compact design make it a valuable tool for both scientific research and industrial applications, paving the way for innovative advancements in imaging technologies.
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Electromechanical response of textured ferroelectric PZT thin film stacks
… exhibited maximum non-linearity and ferroelastic domain switching, contrary to pure (111) texture with more linear behavior and the least amount of switching. A micromechanics model based on the Eshelby inclusion problem was employed to calculate the strain due to domain switching. The model …
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Investigation of electrical, optical and mechanical control of ferroelectric domains using scanning probe microscopy
… and mechanical manipulation of ferroelectric domains in ((K0.5Na0.5)NbO3–2 mol% Ba(Ni0.5Nb0.5)O3−δ) (KNBNNO). KNBNNO is a novel bandgap (1.6 eV) engineered ferroelectric with an excellent piezo-response (100 pm/V). This made it interesting for light-dependent nanoscale investigations using …
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Domain patterns and domain wall dynamics in small-scale ferroelectrics
… major themes: firstly, the intrinsic dynamics of switching in meso/nanoscale ferroelectrics incorporated into device geometries, and secondly, the development of control over the precise mechanics of switching by altering the ferroelectric morphology therein.<br/><br/> In addressing the first …
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Domain wall dynamics and neuronic crackling noise
… likely to be present in each of the different domain walls that develop in four ferroelastic phases. Tetragonal and orthorhombic shear strains have values of 4-6% and 2-3% respectively, and are dominated by coupling with the order parameter for antiferroelectric-type displacements. Conversely, …
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Synthesis-Structure-Property Relationships in Lead-Free Piezoelectric Materials
… through microstructure optimization, domain engineering and multilayering. All these approaches are challenging and require innovation to make a significant impact on the current state-of-the-art. In this thesis, the later line of research was focused which is promising for near future …