1. A. K. Nikumbh, K. S. Rane andA. J. Mukhedkar,J. Mater. Sci. 17 (1982) 2503.
2. Idem, ibid. 18 (1983) 3415.
3. D. Khalafalla andA. H. Morrish,J. Appl. Phys. 43 (1972) 624.
4. A. H. Morrish andG. A. Sawatzky, Proceedings of the International Conference on Ferrites, Japan, edited by Y. Hoshino, S. Lida and M. Sugimoto (University of Tokyo Press, Japan, 1971) p. 144.
5. D. E. Speliotis, J. R. Morrison andG. Bate, Proceedings of the International Conference on Magnetism, Nottingham (Institute of Physics and The Physical Society, London, 1964) p. 623.