Abstract
La-doped SrBi4Ti4O15, SrBi4–xLaxTi4O15 (SBLT-x, x = 0.00, 0.10 and 0.25), thin films have been successfully prepared by the sol–gel method. Structures, surface morphology and ferroelectric properties were investigated. Compared with undoped SBTi, SBLT-0.10 shows a notable larger remnant polarization (2Pr = 46 μC/cm2). Meanwhile, the SBLT-0.10 film shows little change of Pnv and −Pnv up to 4.4 × 1010 switching cycles, suggesting an excellent fatigue-endurance characteristics.
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