Sol-gel processing and magnetic properties of nickel zinc ferrite thick films

Nickel zinc ferrite Ni0.36Zn0.64Fe2O4 (NZF) thick films have been synthesis ed using a dip coating sol-gel process. The coating sol has been formed fro m NZF powders dispersed in the NZF raw sol. A suitable processing temperatu re for the preparation of NZF composite films with reasonable magnetic prop erties has been found to be 400 degrees C. The magnetisation of NZF films i ncreased and coercive force decreased with the processing temperature. Typi cal values of magnetisation and coercive force of the NZF films have been f ound to be Ms = 110 emu/cm(3) and Hc = 20 Oe, respectively. The sol-gel met hod combined with dispersion of ceramic NZF particles in starting sols has been proved to be useful for producing thick nickel zinc ferrite films. (C) 2000 Elsevier Science Ltd and Techna S.r.l. All rights reserved.