1. Research Center for Functional Materials, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
2. Research and Services Division of Materials Data and Integrated System, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
3. Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan