1. Department
of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
2. Department
of Physics, Graduate School of Science, Kyoto University, Oiwake-cho, Kitashirakawa,
Sakyo-ku, Kyoto, 606-8562, Japan