Extended Data Table 1 Electromechanical and electro-optical properties of [001]-oriented PMN-28PT crystals via a.c.- and d.c.-poling

From: Transparent ferroelectric crystals with ultrahigh piezoelectricity

  1. To measure \({\gamma }_{{\rm{c}}}^{{\rm{L}}\ast }\), both the applied electric field and the light beam are along the [001] direction. To measure coefficients \({\gamma }_{33}^{\ast }\) and \({\gamma }_{13}^{\ast }\), the applied electric field is along the [001] direction, and the light beam is along the [110] direction. Note: it is difficult to obtain accurate electro-optical coefficients for d.c.-poled samples owing to the strong light scattering by the high density of ferroelectric domain walls. The errors indicate the s.d. of the corresponding data (more than five samples/data points are used for each measurement).
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