E. Konishi (1), Y. Minorikawa (2), V.I. Galkin (3), M. Ishiwata (4),
  I. Nakamura (4), N. Takahashit (1), M. Kato (5) and A. Misaki (6) ((1)
  Graduate School of Science and Technology, Hirosaki University (2) School of
  Science and Engineering, Kinki University (3) Department of Physics, Moscow
  State University (4) Department of Physics, Saitama University (5) Kyowa
  Interface Science Co., Ltd., Saitama (6)Advanced Research Institute for
  Science and Engineering, Waseda University, Tokyo)