PREPARATION OF CONDUCTIVE BARIUM METAPLUMBATE THIN-FILM USING SOLUTION METHOD

Barium metaplumbate (BaPbO3) thin films were prepared using a chemical solution method. Films with different thicknesses, ranging from 100 n m to 1 mu m, were deposited by the spin coating technique. After dryin g at 300 degrees C and firing between 600-700 degrees C in air, a room -temperature resistivity about 1 m Omega-cm was obtained, which is com parable to that of ceramic bulk. The chemical reaction sequence during heating was investigated using XRD and thermal analysis. It was found that several reactions were involved in a temperature range from 200 degrees C to 600 degrees C. The crystallized films tended to be decomp osed by subsequent deposition, which resulted in the loss of conductiv ity of the films. However, the conductivity could be recovered by firi ng at higher temperatures. In addition, a thickness threshold about 12 00 Angstrom was observed below which the resistivity of the films incr eased rapidly. This phenomenon is discussed in this study.