Three-stage evolution of dynamic hysteresis scaling behavior in 63PbTiO3-37BiScO3 bulk ceramics

The ferroelectric hysteresis loops of 63PbTiO(3)-37BiScO(3) ceramics were measured under sinusoidal electric fields in the range of frequency from 0.1 to 100 Hz and field from 5 to 55 kV/cm. The fitting results showed two linear relations existed between the logarithm of hysteresis area < A > and the logarithm of the amplitude of field E-0 in the first and third field region. In the second region, no linear relation existed due to polarization reversal. These three-stage behaviors were distinct from the existing two-stage behaviors. The slopes in the third stage increase with the increasing of frequency, which can be attributed to dielectric loss under high frequency. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3427566]