SYNTHESIS OF HIGHLY ORIENTED TUNGSTEN BRONZE K(PB0.6BA0.4)(2)NB5O15 THIN-FILMS BY THE CHEMICAL SOLUTION DEPOSITION METHOD

Crack-free K(Pb0.6Ba0.4)(2)Nb5O15 (KPBN60) thin films have been synthe sized by the chemical solution deposition method. A homogeneous and st able precursor solution could be prepared by controlling the reaction of metal-organic compounds in 3-methoxyethanol. KPBN60 precursor powde r crystallized in the tungsten bronze phase above 700 degrees C. KPBN6 0 thin films on MgO(100) and Pt(100)/MgO(100) also crystallized in the tungsten bronze phase with preferred c-axis orientation. Two crystal lattice planes of KPBN60 were intergrown at an orientation of 18.5 deg rees on MgO(100) and Pt(100)/MgO(100) substrates. The KPBN60 thin film s on Pt(100)/MgO(100) substrates exhibited typical ferroelectric P-E h ysteresis loops.