1. Research & Development Group, Hitachi, Ltd., 7-1-1 Omika, Hitachi 319-1292, Ibaraki, Japan
2. Institute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Miyagi, Japan
3. Advanced Technology Research & Development Center, Showa Denko Materials Co., Ltd., 48 Wadai, Tsukuba 300-4247, Ibaraki, Japan
4. International Center for Synchrotron Radiation Innovation Smart, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Miyagi, Japan