1. Department of Material Science and ‡Research Center for New Functional Materials,
Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto,
Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
2. Department
of Chemistry, ||Research Center for Structural Thermodynamics, and §Department of
Physics, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan