Magnetic And Structural Properties Of Cofe2 O4 Thin Films Synthesized Via A Sol-gel Process

Using a sol-gel process having the coconut water as a precursor of organic chain, we synthesized thin films of cobalt ferrite. The films were characterized by using a SQUID magnetometer, an X-ray diffractometer, an X-ray spectrophotometer, Mössbauer spectroscopy and atomic force microscope. Co ferrite films annealed at 500°C for 2 h show grain sizes between 10 and 20 nm, grown as single-phase spinel structure and exhibit high coercivity and a moderate saturation magnetization (above 30kOe). © 2001 Elsevier Science B.V. All rights reserved.226-230PART II14241425Murdock, E.S., (1992) IEEE Trans. Magn., 28, p. 3078Valenzuela, R., (1994) Magnetic Ceramics, , Cambridge University Press, CambridgeOkuno, S.N., (1992) Appl. Phys., 71, p. 5926Naoe, M., Matsushita, N., (1996) J. Magn. Magn. Mater., 155, p. 216Matsushita, N., (1992) IEEE Trans. Magn., 28, p. 3108Dorsey, P.C., (1996) J. Appl. Phys., 79, p. 6338Cheng, F., (1998) Solid. State Commun., 107, p. 471Lee, J.-G., (1998) J. Appl. Phys., 84, p. 2801Macêdo, M.A., Patent Pending. 9804719-1/BRDos S Duque, J.G., Macêdo, M.A., Moreno, N.O., (2000) Phys. Stat. Sol. B, 220, p. 413Blaskov, V., (1996) J. Magn. Magn. Mater., 162, p. 33