Polar nature of stress-induced twin walls in ferroelastic CaTiO3
نویسندگان
چکیده
منابع مشابه
Domains within domains and walls within walls: evidence for polar domains in cryogenic SrTiO3.
Resonant piezoelectric spectroscopy shows polar resonances in paraelectric SrTiO3 at temperatures below 80 K. These resonances become strong at T<40 K. The resonances are induced by weak electric fields and lead to standing mechanical waves in the sample. This piezoelectric response does not exist in paraelastic SrTiO3 nor at temperatures just below the ferroelastic phase transition. The inter...
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modeling S. Choudhury, J. X. Zhang, Y. L. Li, L. Q. Chen, Q. X. Jia, and S. V. Kalinin Department of Materials Science and Engineering, Penn State University, University Park, Pennsylvania 16802, USA MPA-STC, MS K763, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA The Center for Nanophase Materials Sciences and Materials Sciences and Technology Division, Oak Ridge National La...
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We present a model based on continuum elasticity and energy minimization for the study of ferroelastic domain walls close to a surface. We focus on walls orthogonal to the surface, and predict a double-peak structure in the surface values of the squared elastic strain, which is directly related to the chemical reactivity. We also compute the height proole, which can be measured, in principle, e...
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Based on the Landau-Ginzberg free energy functional for an Oh-D4h proper ferroelastic martensitic transformation the mobility of a (I 10) twin boundary in a large bicrystal has been calculated by including dissipation in the approximation of the phonon viscosity model and by solving the inverse boundary value problem for the limiting case of strong shear modulus softening. Application to actual...
متن کاملOrigin of interfacial polar order in incipient ferroelectrics
There are ample experimental evidences indicating that the ferroelastic domain walls of incipient ferroelectrics, such as SrTiO3 and CaTiO3, are polar. The emergence of such interfacial polar order at a domain wall is exciting and believed to arise from the coupling between a primary order parameter, such as a strain or an antiferrodistortive (AFD) order parameter, and polarization. There have ...
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ژورنال
عنوان ژورنال: AIP Advances
سال: 2017
ISSN: 2158-3226
DOI: 10.1063/1.4990608