Preparation of Ba-ferrite thin films by thermal decomposition of coated naphthenate films

Preparation procedure of Ba-ferrite thin films was as follows. The butanol solutions of Pa and Fe naphthenate in molar ratios of n:12 (n=1.0, 1.5, 2.0 and 2.5) were coated on Al2O3 ceramic substrates, dried at room temperature and 110 degrees C, and then thermally decomposed at 550 degrees 0, The above operation was repeated 11 times, and then finally the specimens were heated at various temperatures from 700 to 1400 degrees C, Result of X-ray diffraction of the obtained Ba-ferrite thin films showed that the most suitable molar mixing ratio of the naphthenates and the temperature of the final heating were 1.5 : 12 and 900 degrees C, respectively, The thin film prepared under the above conditions had saturation magnetization of 134 emu/cm(3), residual magnetization of 73 emu/cm(3), and coercive force of 4.42 kOe.