Rhombohedral superlattice structure and relaxor ferroelectric behavior of (Pb0.70Ba0.30)ZrO3 ceramics
作者： Bhadra P Pokharel , Rajeev Ranjan , Dhananjai Pandey , V Siruguri , SK Paranjpe
DOI: 10.1063/1.123113
关键词:
摘要: Superlattice reflections observed in the neutron powder-diffraction patterns of (Pb0.80Ba0.20)ZrO3 (PBZ20) and (Pb0.70Ba0.30)ZrO3 (PBZ30) are explained terms doubled rhombohedral cell (R3c). A Rietveld analysis data reveals that displacements Pb2+/Ba2+ Zr4+ decrease with increasing Ba2+ content while thermal parameter for increases becomes similar to ferroelectric relaxors. Dielectric studies indeed confirm relaxor behavior PBZ30 Vogel–Fulcher type relaxational freezing.
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