1. Laboratory for Materials and Structures Institute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta Midori‐ku Yokohama 226‐8503 Japan
2. ACCEL Program Japan Science and Technology Agency Kawaguchi 332‐0012 Japan
3. New Product R&D Center Asahi Glass Co. Ltd. 1150, Hazawa Kanagawa‐ku Yokohama 221‐8755 Japan
4. Materials Research Center for Element Strategy Tokyo Institute of Technology Mailbox SE‐1, 4259 Nagatsuta Midori‐ku Yokohama 226‐8503 Japan