1. Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
2. Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
3. Department of Physics, Faculty of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
4. Department of Physics, Faculty of Science, Niigata University, Niigata 950-2181, Japan