1. N.Kubota, Y.Shiohara and S.Tanaka (1994) J. Mater. Res. 9: 1104.
2. T.Matsumoto, T.Kawai, K.Kitahama, S.Kawai, I.Shigaki and Y.Kawate (1991) Appl. Phys. Lett. 58: 2039.
3. P.Bodin, S.Sakai, Y.Kasai and H.Tanoue: Proc. 4th Int. Symp. Superconductivity (ISS ‘81), Tokyo (Springer-Verlag, Tokyo, 1992 ): 789.
4. T.Sugimoto, H.Hayashi, H.Sakai, N.Kubota, K.Sugawara, R.Itti, Y.Shiohara, N.Koshizuka and S.Tanaka: Proc. 4th Int. Symp. Superconductivity (ISS ‘81), Tokyo (Springer-Verlag, Tokyo, 1992 ): 777.
5. Y.Matsui, H.Maeda, Y.Tanaka and S.Horiuchi (1989) Jpn. J. Appl. Phys. 28: L946.