1. N. Hiratsuka, S. Tojo, E. Koshikawa, M. Fujita, J. Magn. Soc. Jpn. 18, S1 (1994) 315.
2. Recording performance of longitudinal barium ferrite thin film media
3. T. Siosawa, M. Ichinose, N. Matsushita, S. Nakagawa, M. Naoe, J. Magn. Soc. Jpn. 21, S2 (1997) 73.
4. H. Taguchi, Y. Minachi, K. Masuzawa, H. Nishio, Eighth Proceedings of the International Conference on Ferrites, 2000, p. 405.