STRUCTURAL AND ELECTRICAL PROPERTIES OF FERROELECTRIC BI3.4PR0.6TI3O12 PREPARED BY A SOL-GEL METHOD

ABSTRACT The Bi3.4Pr0.6Ti3O12 (BPT) thin film and powder have been prepared by a sol-gel method with annealing at 700°C. Randomly oriented BPT thin film exhibits a large remanent polarization, 2P r = 62 μC/cm2. Structure of sol-gel derived BPT powder has been refined by a Rietveld method resulting a reasonable goodness of fit (wR p = 6.9%, and R p = 5.5%) using orthorhombic (B2cb, a = 5.4221 Å, b = 5.4032 Å, and c = 32.8361 Å). Two different TiO6 octahedra exhibit different polarization directions; (100) from Ti(1)O6, and close to (111) from Ti(2)O6, which explains large 2P r of the randomly oriented BPT thin film.

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