Masaki Azuma1), Kei Shigematsu1), Hajime Hojo2), Runze Yu3), Youwen Logn3), Ko Mibu4)
1) Laboratory for Materials and Structures, Tokyo Institute of Technology, 2) Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 3) Institute of Physics, Chinese Academy of Science, 4) Graduate School of Engineering, Nagoya Institute of Technology