J. Phys. IV France 07 (1997) C1-499-C1-500
Ba-Ferrite Films Prepared by Sol-Gel Dip CoatingW.-D. Cho1, T.-B. Byeon2, K.A. Hempel3, D. Bonnenberg3, C. Sürig3 and T.-O. Kim1
1 Laboratory of Electromagnetic Materials, Department of Inorganic Materials, Pusan National University, Jangjeon-dong, Kumjeong-ku, Pusan, 609-735, Republic of Korea
2 Resource Utilization Team, Research Institute of Industrial Science & Technology, P.O. Box 135, Pohang, 790-330, Republic of Korea
3 Institut für Werkstoffe der Elektrotechnik, RWTH, 52056 Aachen, Templergraben 55, Germany
We investigated on the crystallographic, morphological and magnetic characteristics of barium ferrite-SiO2/Si films prepared by sol-gel dip coating method. It is found that the sol obtained at 80°C for 90 min. is the most suitable for coating. The particles formed in the films prepared by heat treatment at 800°C for 3 hours exhibits needle-like particles placing parallel to substrate. The saturation magnetization increases as thickness increases, and its maximum value is 260 emu/cm3. The direction of easy-magnetization in the films has tendency to vary from perpendicular to parallel to substrate as thickness increases.
© EDP Sciences 1997