Affiliation: | aDepartment of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai, Osaka 599-8531, Japan bDepartment of Materials Science, Japan Atomic Energy Research Institute (JAERI-Tokai), Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan cDepartment of Physics, Okayama University, 2-1-1 Tsushima-Naka, Okayama 700-8530, Japan dResearch Institute for Advanced Science and Technology, Osaka Prefecture University, 1-2 Gackuencho, Sakai, Osaka 599-8570, Japan |