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Triple Hysteresis Loops of PLZST Ceramics Related to Coexistence of Ferroelectricity and Antiferroelectricity

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The hysteresis behaviors and phase characteristics of Pb0.97La0.02(Zr0.90Sn0.025Ti0.075)O3 (PLZST) ceramics were investigated in this work. A single mini hysteresis loop at 3 kV/mm with the maximum polarization (P max) of 8.3 μC/cm2 and triple hysteresis loops at 6.6 kV/mm were observed, which indicates the coexistence of rhombohedral ferroelectric phase and tetragonal antiferroelectric phase. The X‐ray Diffraction patterns and dielectric temperature spectra both demonstrate this coexistence. Moreover, the hysteresis loops with increasing temperature indicated that a ferroelectric–antiferroelectric phase transition occurred at about 60°C. These phenomena would be useful for understanding the domain evolution during ferroelectric and antiferroelectric phase transition.
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Keywords: ferroelectricity/ferroelectric materials; lead lanthanum zirconate titanate; phase transformations

Document Type: Research Article

Publication date: June 1, 2016

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