1. 1) T. Nakayama, N. Honjou, T. Minaga and H. Yashiki: J. Magn. Magn. Mater., 234 (2001), No. 1, 55.
2. 2) Y. Oda, Y. Tanaka, N. Yamagami, A. Chino and K. Yamada: NKK Tech. Rev., 87 (2002), 12.
3. 3) Z. Z. He: Electric Steel, Metallurgical Industry Press, Beijing, (1997).
4. 4) T. Tsao and H. G. Katayama: Trans. Iron Steel Inst. Jpn., 26 (1986), No. 7, 717.
5. 5) H. Matsuno, Y. Kikuchi and K. Yamada: Tetsu-to-Hagané, 85 (1999), No. 7, 509.