1. [1] S. Nasu, K. Matsumoto, K. Hashimoto and K. Saiki: IEEE Trans. Magn., Vol.MAG-23, No.5, pp.2257 (1987).
2. [2] K. Hashimoto, A. Nakajima, S. Nasu, K. Matsumoto and K. Saiki: Dig.11th Annual Conf .Mag.Jpn., (in Japanese), 1pA-2 (1987).
3. [3] S. Nasu, A. Nakajima, K. Matsumoto, K.Hashimoto and K. Saiki: J.Mag.Soc.Jpn., (in Japanese), Vol.12, No.2, pp.65 (1988).
4. [4] M. Isurugi, S. Nasu, K. Matsumoto, A. Nakajima and K. Saiki: J.Mag.Soc.Jpn., (in Japanese), Vol.13, No.2, pp.71 (1989).
5. [5] N. Watanabe, Y. Ishizaka, K. Kimura and E. Imaoka: IEEE Trans.Magn., Vol.MAG-21, No.2, pp.1426 (1985).