Switching current measurements have been carried out on relaxor ferroelectric single crystal - pure PZN, and the solid solution (1-x) Pb(Zn1/3Nb2/3)03 - x PbTiO3 with x= 0.04, 0.09, 0.10. Measurements have been done for crystallographic directions  and  for all these compositions. Switching times versus the applied field showed the following results. Pure PZN along  and 0.90PZN - 0.10PT along , and  showed an exponential dependence. Along  the PZN showed a linear fit. For solid solution single crystals-0.96PZN -0.04PT and 0.91PZN - 0.09PT, a linear fit was obtained for the reciprocal switch times versus applied field for both the directions. If we draw a parallel picture with the reported barium titanate data, it appears that the polarization reversal is controlled by nucleation along - spontaneous direction for PZN and ,  for 0.90PZN - 0.10PT. The mobility of the reversed domains controls the reversal along  for PZN and the solid solution single crystals with rhombohedral composition along  and . The transient current curves showed two maximum points for crystals with x = 0.04 and 0.09. This is attributed to the co-existence of the two phases in 0.96PZN -0.04PT and 0.91 PZN - 0.09PT crystals.
|Original language||English (US)|
|Number of pages||6|
|Journal||Materials Research Society Symposium - Proceedings|
|State||Published - 2000|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials