1. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
2. Center for Advanced High Magnetic Field Science (AHMF), Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
3. Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
4. Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan