Temperature- and electric field-dependence of polarization hysteresis for a [001]<sub>c</sub> poled PMN-PT single crystal
Zhaojiang Chen, Lijiang Song, Hengli Zhao, Yang Zhang, Wenwu Cao
Abstract
The dynamic hysteresis scaling behaviors of a [001]c poled Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-0.28PT) single crystal have been explored as a function of amplitude E0 and frequency f of the external electric field in a temperature region from 298 K to 388 K. The various scaling properties for hysteresis parameters such as area <A>, coercive field Ec, saturation polarization Ps vs temperature T, amplitude E0 and frequency f were characterized among different temperature region. It was discovered that temperature has a critical influence on the polarization dynamic hysteresis and phase transformation characteristics of the PMN-0.28PT single crystal, and especially it was noticed that the discrepancy of the scaling relation between ln<A> and lnE0 in low-field and high-field ranges decreases with increasing temperature. Meanwhile, the slope k in the linear equation ln<A> = klnE0 + b increases while intercept b decreases with T in the temperature region of rhombohedral or tetragonal phase. In addition, temperature has a significant effect on the exponent α in the power law <A>∝ f α and the appearance of peak value in the relation between ln<A> and lnf can be mainly contributed to the frequency dependence of Ec.