1. Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, Himeji, Hyogo 671-2280, Japan
2. Department of Material Science, Graduate School of Science, University of Hyogo, Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
3. Rigaku Corporation, Matsubaracho, Akishima, Tokyo 196-8666, Japan