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Showing 1 to 20 of 28 for “"Ferroelastic"”.
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Multiscale characterization of ferroelastic deformation in ceramic materials
The student, Charles Smith, submitted this Dissertation for approval on 2020-06-04 at 13:03.
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Raman spectroscopy: from ferroelastic domain identification to strain tuning
… is a powerful tool for the investigation of ferroelastic domain formation in multiferoic materials, being able to probe the tilt of the domain walls.
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On the Rubber-Like Memory and Ferroelastic Behavior in Beta-Prime. Gold-Cadmium
Made available in DSpace on 2014-12-12T01:04:06Z (GMT). No. of bitstreams: 1 7317401.pdf: 1739224 bytes, checksum: 2c6df2cb62e73b6510230212fc822f9f (MD5) Previous issue date: 1972
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Understanding Ferroelastic Domain Reorientation as a Damping Mechanism in Ferroelectric Reinforced Metal Matrix Composites
… ability can be attributed to the ferroelectric/ferroelastic nature of the reinforcement.
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Investigating Ferroelastic and Piezoelectric Vibration Damping Behavior in Nickel-Barium Titanate and Nickel-PZT Composites
… (PZT) is due to the anelastic response of ferroelastic domain walls to applied external stress. In piezoelectric ceramics, vibration energy can also be dissipated through the direct piezoelectric effect if the appropriate electric circuit is connected across the ceramic. In this work we …
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Characterization of hydrogen embrittlement on novel low-Ni austenitic stainless steels & the investigation of ferroelastic domain mobility in barium titanate
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Investigation of Ferroelectric Thin Film Using Piezoresponse Force Microscopy
… As many of these materials also exhibit ferroelasticity, the interplay between ferroelectric and ferroelastic phenomena is a subject of intensive research. In earlier work on this topic, resonance enhanced piezoresponse force microscopy was introduced and theoretical models were developed …
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In-Situ, in Air, High-Temperature Phase Transformations in Rare-Earth Niobates and Titanium Oxides (Dysprosium and Yttrium) Using a Thermal-Image Furnace
… elevated temperatures beyond the commonly known ferroelastic monoclinic-to-paraelastic tetragonal transformations. A series of high-temperature powder patterns of the pure hexagonal phase of DY2TiO5 was also collected in-situ, in air."
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Spectroscopic perspectives on ultrafast coupling phenomena in perovskite oxides
… response in bulk SrTiO_3, which displays a ferroelastic phase transition from a cubic to a tetragonal structural phase at T_a=105 K. In the linear regime, I observe a coupling of the observed acoustic phonon mode to the softening optic modes describing the phase transition. In the nonlinear …
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The Zsm-39 Zeolite Dodecasil-3c: A New Ferroic Material
… switch orientations, indicating that Py-D3C is a ferroelastic material.
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Chemical diffusion of oxygen in yttrium barium(2) copper(3) oxygen(6+x)
… interrelationship between oxygen mobility and ferroelastic characteristics. Oxygen jump mechanisms in YBCO were also proposed and evaluated using an oxygen interaction model. Crystal growth mechanisms in YBCO are highly anisotropic, with extremely slow growth in the c-axis direction. However, …
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New modalities of strain-based engineering of ferroelectrics: domain structure and properties of PbZr1-xTixO3 thin films
… of generating phase competition and high-energy ferroelastic domain structures to enhance ferroelectric susceptibilities. We, for the first time, grow epitaxial thin films of PbZr1-xTixO3 across the compositional phase diagram, and show that the rate of strain relaxation is significantly enhanced …
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High-strain actuation of lead-free perovskites : compositional effects, phenomenology and mechanism
… mixed cases of ferroelectric, antiferroelectric, ferroelastic and paraelectric behavior has been developed. Major electromechanical properties of polycrystalline BNBZT have been identified and compositionally mapped. The peak of electromechanical response (d33 = 400 pC/N) has been found at the …
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Domain wall dynamics and neuronic crackling noise
… 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, shear strains, $e_4$, $e_5$ and …
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Multiferroic Bismuth Ferrite-Lead Titanate and Iron-Gallium Crystalline Solutions: Structure-Property Investigations
… of at least two of the ferroelectric, ferroelastic and ferromagnetic effects-have attracted enormous research activities. In this thesis, the structure and properties of multiferrioic BiFeO3-x%PbTiO3 and Fe-x%Ga crystalline solutions were investigated. First, the results show that …
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Structure-Property Relationships of Multifeorric Materials: A Nano Perspective
… fields (ferromagnetics), or mechanical stress (ferroelastics) as they transform from nonferroic to ferroic states, contributing to the sensing and actuating capabilities. This research focuses on two multiferroic crystals, Pb(Mg1/3Nb2/3)O3-PbTiO3 and Fe-Ga, which are characterized by the …
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Magneto-Elastic Interactions in a Cracked Ferromagnetic Body
… this study. The model considers a soft magnetic ferroelastic body and incorporates a realistic (nonlinear) susceptibility. A moving crack is present in the body and is propagating in a direction perpendicular to the magnetic field. Assuming that the processes in the moving coordinates are …
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Stability of lithium aluminum manganese oxide cathodes for rechargeable lithium batteries
… antiphase nanodomain structure, which becomes a ferroelastic domain structure during the cubic ---> tetragonal Jahn-Teller transformation, and thereby accommodates the transformation strains. (3) Al-doped spinels exhibit much improved capacity stability at elevated temperatures compared to …
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Charged domain wall phenomena and associated negative capacitance in boracites
… boundaries in a sample of improper ferroelectric-ferroelastic copper-chlorine boracite Cu3B7O13Cl (Cu-Cl boracite) that is commensurate with a non-transient negative capacitance effect.<br/>As a benchmark, and to ensure that I could make valid statements about the electric field-induced changes in …
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Electromechanical response of textured ferroelectric PZT thin film stacks
… showed that the mechanical, piezoelectric and ferroelastic properties of PZT thin films depend strongly on grain orientation. The open circuit PZT modulus varied linearly with %(001) and %(111) texture factors between the two texture bounds: a lower bound for 100% (001) and an upper bound for …
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