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 an d the surface morphology of the BNN thin films prepared were investiga ted by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Single-phase BNN thin films were prepared at O-2 gas pressure of 1.0x 10(-1) Torr with marked (00l) plane orientation. The surface morpholog y of BNN thin films improved with increasing O-2 gas pressure.