Ferroics Whose Faintness Index for Ferroelectricity or Ferroelasticity is Unequal to That of the Soft Vibrational Modes
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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 ferroelectrictiy 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 (dy/dY)_3 varies with temperature is not necessarily independent of n_M; it can be essentially dissimilar to that when n_M=n_F.
- 社団法人日本物理学会の論文
- 1973-09-05
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