The influence of the coexistence of ferroelectric and antiferroelectric states on the lead lanthanum zirconate titanate crystal structure

Abstract

We present results of detailed investigation of the crystal structure of Pb1−3x/2Lax(Zr1−yTiy)O3 solid solutions. In this letter our attention is concentrated on the series of solid solutions with x = 6% usually referred to as relaxor ferroelectrics. We have established the reasons for the non-cubic crystal structure of these solid solutions at the temperatures below TC. It is demonstrated that the peculiarities of the properties of Pb1−3x/2Lax(Zr1−yTiy)O3 depend on the position of a particular solid solution with respect to the hysteresis ferroelectric–antiferroelectric region in the 'Ti-content–temperature' phase diagram.