1. Superconducting
Properties Unit, National Institute for Materials Science, 1-1
Namiki, Tsukuba, Ibaraki 305-0044, Japan
2. Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
3. Department
of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
4. International
Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
5. Materials
Analysis Station, National Institute for Materials Science, 1-2-1
Sengen, Tsukuba, Ibaraki 305-0047, Japan
6. Graduate
School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
7. Materials
Processing Unit, National Institute for Materials Science, 1-2-1
Sengen, Tsukuba, Ibaraki 305-0047, Japan
8. Computational
Materials Science Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan