Affiliation: | aOita University, 700 Dannoharu, Oita 870-1192, Japan;bNational Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaragi 305-0047, Japan;cTokyo National College of Technology, 1220-2 Kunugida, Hachiouji, Tokyo 193-0097, Japan;dMusashi Institute of Technology, 1-28-1 Tamazutsumi Setagaya-ku, Tokyo 158-8577, Japan |