1. M. Kikuchi, H. Fujimori, Y. Obi, T. Masumoto, Japan J. Appl. Phys., 14, 1077 (1975).
2. H. Fujimori, et al., 2nd International Symposium on Amorphous Magnetism, Aug. (1976).
3. H. Senno, H. Sakakima, E. Hirota, Sci. Rep. Res. Inst. Tohoku University, A‐28, Suppl. No. 1 276 (1980).
4. M. Takahashi, S. Ishio, Japan J. Appl. Phys. 16, 2273 (1977).
5. H. Sakakima, H. Senno, Y. Yanagiuchi, E. Hirota, National Technical Report, 25(5) 858 (1979).