Abstract
Pure Bi4Ti3O12 thin films with outstanding ferroelectric properties are reported. These films have been prepared by spin coating on substrates with a chemical solution. A (117)-preferred growth occurs at the annealing temperature of 600°C. These films have a low coercive field of ∼35kV∕cm, a remanent polarization >20μC∕cm2, a nonvolatile polarization >37μC∕cm2 after 1010 sweep cycles, and a leakage current density ∼10−5A∕cm2 at the coercive field. The excellent ferroelectric properties are attributed to the chemical preparation, which corresponds to chemical bonding and defects, dissolution of the chemical precursors, and precipitation of the spin-coating solution.
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