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In this study we take the view that frequency dependence of ferroelectric hysteresis is a result of direct competition between the speed of polarization evolution and the speed of external loading. We used the Ginzburg–Landau kinetic equation to evaluate the evolution of polarization vectors. We also devised a polycrystal model with a core–shell grain configuration to reflect the effect of the grain-boundary...
A simple and straightforward method to obtain a complete set of twining planes and habit planes of martensitic crystals by using the crystallographic data is proposed under the bulk strain energy minimization hypothesis. This method can also be used to obtain the diffraction pattern corresponding to martensitic transformation forming the invariant planes. Applications to the cubic->trigonal and...
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