1. [1] I.Tagawa, Y.Nakamura : Digest of the 14th Annual Conference on Magnetics in Japan p254(1990) (in Japanese)
2. [2] Y.Niimura, S.Nakagawa, Y.kitamoto, M.Naoe : J.Appl.Phys. 61, p3152(1987)
3. [3] S.Akiyama, Y.Furuto, S.Nakagawa, M.Naoe : J.Appl.Phys. 67, p5181 (1990)
4. [4] K.Tohma, K.Honda, R.Sugita, Y.Sakamoto, T.Kohzaki : IEICE Tech. Rep. MR87-59 p7(1987) (in Japanese)
5. [5] Y.Honda, M.Futamoto, K.Yoshida, Y.Uesaka, Y.Shiroishi, H.Kakibayashi : Trans. IEICE Japan J69-C, p85(1986) (in Japanese)