Showing papers on "Ferroelasticity published in 1973"
TL;DR: In this paper, single crystals of Pb 3 (PO 4 ) 2 were grown by the Czochralski technique and the predicted number of domain walls have been observed.
85 citations
TL;DR: In this article, the point group of the prototypic phase and the irreducible representation for the soft vibrational modes with zero wavenumber are specified at discretion, the ferroic species are determined and the faintness indices for ferroelectricity and ferroelasticity are evaluated.
Abstract: When the point group of the prototypic phase and the irreducible representation for the soft vibrational modes with zero wavenumber are specified at discretion, the ferroic species are determined and the faintness indices for ferroelectricity and ferroelasticity are evaluated. The results are shown together in a table, by surveying which it is found that with respect to the electric polarization components the faintness indices range from 1 to 6, and with respect to the mechanical strain components from 1 to 3. It is also found that of the 212 nonmagnetic ferroic species 48 are not generated by a zero-wavenumber vibrational mode or a set of degenerate zero-wavenumber vibrational modes.
14 citations
TL;DR: In this paper, the authors considered the case of n M < n F ≤ ∞ and showed that the susceptibility of the soft vibrational modes and the ferroic phase with respect to temperature depends only on n F and not on n M.
Abstract: Let y and Y denote a given component of electric polarization vector or mechanical strain tensor and the corresponding component of electric field vector or mechanical stress tensor, respectively. Let n M and n F denote the faintness index for ferroelectricity or ferroelasticity of the soft vibrational modes and of the ferroic phase with respect to the component y . Cases of n M < n F ≤∞ are considered in a general way and also with examples. How y s (s is the initial of “spontaneous”) varies with temperature depends only on n F and not on n M ; the way of dependence on n F is essentially the same as when n F = n M . On the other hand, how the susceptibility (d y /d Y ) s varies with temperature is not necessarily independent of n M ; it can be essentially dissimilar to that when n M = n F .
14 citations
TL;DR: Isopropyl ammonium chloroplatinate (C3H7NH3)2PtCl6 and the corresponding chlorostannate 2SnCl6 are demonstrated to be ferroelastic by observation of the stress-induced motion of (100) and (001) shear domain walls as discussed by the authors.
Abstract: Isopropyl ammonium chloroplatinate (C3H7NH3)2PtCl6 and the corresponding chlorostannate (C3H7NH3)2SnCl6 are demonstrated to be ferroelastic by observation of the stress‐induced motion of (100) and (001) shear domain walls. The ferroelastic transition temperatures are at 37 and 40 °C, respectively, at room pressure and increase approximately linearly with increasing hydrostatic pressure. X‐ray structure analysis and the absence of measurable second‐harmonic generation (SHG) in either higher‐ or lower‐temperature phases suggest that these crystals belong to the Aizu ferroelastic species mmmF2/m.
3 citations