Interpretation of Polar Orders Based on Electric characterizations : example of Pb (Yb1/2Nb1/2)O3-PbTiO3 Solid solution
Résumé
Characterizing the polar order is a fundamental step in the understanding of a
material and a necessity for application purposes since each polar order is
associated with specific functionalities. Here, using the Pb(Yb1=2Nb1=2)O3-
PbTiO3 (PYN-PT) solid solution as an example, we propose to differentiate the
polar order based on two simple electrical characterization methods: measurement
of the dielectric constant and hysteresis loops. Comparing the
dielectric constant measured in high and low electric field conditions, we show
that the polarization-electric field measurements may induce out-of-equilibrium
phases. The better understanding of the effect of the measuring conditions
on the polar order has led us to propose a new sequence of equilibrium
polar orders in the PYN-PT solid solution at room temperature.