1. Department of Materials Chemistry National Institute of Technology Asahikawa College Shunkodai 2–2-1-6 Asahikawa Hokkaido 071-8142 Japan
2. Hydrogen Isotope Research Center Organization for Promotion of Research University of Toyama Gofuku 3190 Toyama 930-8555 Japan
3. Department of Materials Science and Technology Faculty of Engineering Nagaoka University of Technology Kamitomioka 1603–1 Nagaoka Niigata 940-2188 Japan