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Ba2NaNb5O15 Thin Films Prepared by the Pulsed Laser Ablation Method

Ferroelectric thin films of barium sodium niobate, Ba2NaNb5O15 (BNN), were prepared on platinum (Pt) substrates by the pulsed laser ablation technique using a BNN ceramic target. Crystallographic properties and the surface morphology of the BNN thin films prepared were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Single-phase BNN thin films were prepared at O2 gas pressure of 1.0×10-1 Torr with marked (00l) plane orientation. The surface morphology of BNN thin films improved with increasing O2 gas pressure.