Kei Shigematsu1), Takeshi Asakura1), Hajime Yamamoto1), Keisuke Shimizu2) , Haruki Shimizu1), Marin Katsumata1), Hajime Hojo2), Ko Mibu3), Masaki Azuma1)
1) Laboratory for Materials and Structures, Tokyo Institute of Technology, 2) Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 3) Graduate School of Engineering, Nagoya Institute of Technology