1. Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-ku, Sendai, Japan
2. Institute for Material Research, Tohoku University, Aoba-ku, Sendai, Japan
3. New Industry Creation Hatchery Center, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
4. C&A Corporation, Aoba-ku, Sendai, Japan